Malicious PDF — malware analysis report

Static analysis result for SHA-256 58a66a146a631c69…

MALICIOUS

PDF

80.8 KB Created: 2021-04-01 02:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 36e3deaaa83ae47f2b919bb075b84f3c SHA-1: 2a377fd9e2d3b2da5f0ee170cdd6bcab6971de03 SHA-256: 58a66a146a631c69f64343f830cac1f7d0c2e51b1ff7b3fd0576d6d01d7723a5
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The presence of 'utm_term' in one URL indicates tracking for marketing or malicious redirection. ClamAV detection and ML classification strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/strik?utm_term=mitsubishi+mr+slim+inverter+remote PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451551/normal_60228b8a62ebf.pdfIn PDF document text
    • https://cdn.sqhk.co/fogunedevare/gghegfn/9697656721.pdfIn PDF document text
    • https://sufimademum.weebly.com/uploads/1/3/4/2/134236216/145a962763a.pdfIn PDF document text
    • https://matazesugol.weebly.com/uploads/1/3/4/7/134702103/c7198da09.pdfIn PDF document text
    • https://wilukogata.weebly.com/uploads/1/3/5/3/135388132/38807aee38.pdfIn PDF document text
    • https://vexefanakaxaki.weebly.com/uploads/1/3/4/8/134871487/pulevejof-pogaxun.pdfIn PDF document text
    • https://kivenawuvu.weebly.com/uploads/1/3/1/1/131163776/rukapil_damid_ratuve.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/mihgijm/miwages.pdfIn PDF document text
    • https://giliruba.weebly.com/uploads/1/3/1/4/131483170/rezebivenalubag_mufum.pdfIn PDF document text
    • https://dupevikalibo.weebly.com/uploads/1/3/4/6/134659617/7073239.pdfIn PDF document text
    • https://sobapeseg.weebly.com/uploads/1/3/1/0/131070394/rigofaza.pdfIn PDF document text
    • https://xulavuxedipi.weebly.com/uploads/1/3/4/0/134017657/zajagefexo_wetipimume_nikafutizun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365575/normal_5fdf638497938.pdfIn PDF document text
    • https://tifimiwarefimi.weebly.com/uploads/1/3/4/8/134895051/juxomun-vefavatazo-mewewudep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f99e3c86-5fd7-49ea-a631-976d82fba24c/32461803958.pdfIn PDF document text
    • https://176fe727-baa2-4f6f-8ab0-cddcd97ecb74.filesusr.com/ugd/45df28_23dfa7c13114420aa8ce0f2ed6bc43d2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/073c6cf8-2cd6-48a5-9c64-f6ec1a74442c/the_chronicles_of_narnia_the_lion_the_witch_and_the_wardrobe_full_movie_download_in_hindi_dubbed.pdfIn PDF document text
    • https://89511c73-251b-4bee-a1a5-5f4bd4863124.filesusr.com/ugd/f24cb8_03b0c0e33c8b406da6c55ead3aff178b.pdf?index=trueIn PDF document text
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_214e4af25fff4b4fb3507fbd361c9fbf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/885195c7-af51-40ed-a457-4a9a258d8f09/how_to_critique_a_poetry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/418f9c06-d5e4-46e2-b673-5e4b033aa481/skyrim_se_best_mods_2020.pdfIn PDF document text
    • https://181f3bdf-810f-4c34-abb3-9f3362228cd6.filesusr.com/ugd/30415f_5d3035ff4a55405895329ff5fad6422f.pdf?index=trueIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_4adbcc8ee2c2499a84453a322e31751e.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08D 4920 bytes
SHA-256: bffac0354d47455640db838608a8d023d2ffd8953e4242f4e64328d82144771c
font_01_sfnt_off0000f12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12C 10804 bytes
SHA-256: b3686c2c3c09dfd5b607c3f9e902273fee53b0f25e7c2189c5b74df8624b9dcd
font_02_sfnt_off00011630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11630 19532 bytes
SHA-256: 0ddd726138e98ef26b116d962e6a66d503c3e44d4af23a68f4f4f59832fcdd3e