Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de468055f241ca7…

MALICIOUS

PDF

105.3 KB Created: 2021-06-02 16:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 854aa3e628da65dbea9451e69b983b8f SHA-1: 7d58b9882ef728e64ec1be78fed52ebf176537f8 SHA-256: 1de468055f241ca76099c64f2e39be457bee74998567c5ffc63168085a53d989
206 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • 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://crysiq.ru/pbw?utm_term=human+psychology+books+in+hindi+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487625/normal_606250b9d32f4.pdfIn PDF document text
    • https://zebaraxofalolal.weebly.com/uploads/1/3/0/8/130813897/79c8e7c6f138b.pdfIn PDF document text
    • https://podosutopo.weebly.com/uploads/1/3/4/5/134590637/27551c2cf1.pdfIn PDF document text
    • https://nesaresivegixan.weebly.com/uploads/1/3/1/4/131453215/pubebamiganijixo.pdfIn PDF document text
    • https://panulozeti.weebly.com/uploads/1/3/5/3/135351273/xujubudobapa.pdfIn PDF document text
    • https://xojujafu.weebly.com/uploads/1/3/4/6/134633902/bemasero.pdfIn PDF document text
    • https://vokafevevuw.weebly.com/uploads/1/3/4/3/134320681/liwaxirorigel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461498/normal_6011f34c515fc.pdfIn PDF document text
    • https://muwigoxafom.weebly.com/uploads/1/3/4/8/134869335/1531304.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391314/normal_5fdc5a4ecc2f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401983/normal_601974cde0bf9.pdfIn PDF document text
    • https://wegogitizunivom.weebly.com/uploads/1/3/4/3/134369171/875057.pdfIn PDF document text
    • https://vimebadexij.weebly.com/uploads/1/3/5/2/135295776/jowiwirafezijugop.pdfIn PDF document text
    • https://sivamodinuna.weebly.com/uploads/1/3/4/7/134762665/5500422.pdfIn PDF document text
    • https://pevetogebika.weebly.com/uploads/1/3/5/3/135335423/zaxosolamugada_kirilali.pdfIn PDF document text
    • https://leputixoted.weebly.com/uploads/1/3/2/6/132683438/pulumimu_rejobuzejab.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/c130c311-e513-41eb-ac7d-66a33f307adc/90075037635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad98eb17-63cb-4215-b586-f82febdc0feb/how_much_do_plc_programmers_make_a_year.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd5e8d95-80f1-4a38-a1ff-36fed9b20ad8/troy_bilt_tiller_tire_pressure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87aa2aa9-12ab-4dd5-b0ba-701aacb5461a/brother_hl-l3290cdw_default_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36e630d8-c436-488d-8b56-c658daee58cd/mean_from_a_grouped_frequency_table_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0677c148-d157-484a-9299-1e9dda9c8f53/ffxi_solo_leveling_guide_1-75.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/279e415a-4eba-430d-9ace-ac039bcecf08/toyota_corolla_gli_2016_automatic_for_sale_in_lahore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/193d9e60-23be-4c21-aa0c-3408a353307f/paleredadajafopuwive.pdfIn 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_off0001477c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1477C 5740 bytes
SHA-256: fdabbcfac0b89ac063acb1e3983d378ffe61aca57b7928948c7e9163f1b80dec
font_01_sfnt_off00015ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AE5 10924 bytes
SHA-256: fbcadc422d5fe035f79873a7b06866d1092582ac3c36225b858053157a568f3e
font_02_sfnt_off0001805a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1805A 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3