Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eaaecc32967a225…

MALICIOUS

PDF

106.6 KB Created: 2021-02-24 00:46:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 271a6341ed7c5122adb68a8ace4c8792 SHA-1: 8f178e43ad1b3bcc19e16fb93ed04cf48a2ed154 SHA-256: 8eaaecc32967a2251216e166ca7c698b1a29f3f9aa731fa698f5d01a020dc04d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to disposable domains and hosted on services like Weebly, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine a more specific attack pattern beyond link abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://jottigo.ru/wix?keyword=ace+driving+school+online PDF link annotation
    • https://cdn.sqhk.co/xejudawadoni/jeifGSi/space_engineers_downloading_mods_has_failed.pdfIn PDF document text
    • https://pufopobumosuv.weebly.com/uploads/1/3/0/7/130776602/586a48.pdfIn PDF document text
    • https://wireluxibesoz.weebly.com/uploads/1/3/4/4/134402736/tizapi.pdfIn PDF document text
    • http://euroshopme.site/tawisesoduworo8ea77.pdfIn PDF document text
    • https://xumebarukez.weebly.com/uploads/1/3/4/6/134687090/1343497.pdfIn PDF document text
    • http://teksalle.xyz/catalogo_avon_campaa_15_2018gg9xk.pdfIn PDF document text
    • http://inmyshtangen.xyz/88782577704i702m.pdfIn PDF document text
    • http://nikaold.site/we_alone_alice_walker0cxkc.pdfIn PDF document text
    • http://wwbook.org/ps_vita_used_price_in_pakistanh5dll.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369516/normal_601f80962e876.pdfIn PDF document text
    • https://junerokiwoji.weebly.com/uploads/1/3/0/7/130775834/cb243cc300732.pdfIn PDF document text
    • https://visimekariluvog.weebly.com/uploads/1/3/1/4/131483525/4823871.pdfIn PDF document text
    • https://soxuwewoduxewu.weebly.com/uploads/1/3/4/0/134042667/kafoposuke.pdfIn PDF document text
    • http://swiss-gear-top.xyz/fuvuzekidxm.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/eihifgh/road_trip_essentials_amazon.pdfIn PDF document text
    • http://chambrehub.xyz/wufape6y9lr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404108/normal_5fc842ca21f09.pdfIn PDF document text
    • https://nudegono.weebly.com/uploads/1/3/4/6/134682657/zebujulimifaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412181/normal_602f147c8821a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16470 5040 bytes
SHA-256: 795911e37253dcf59d3ebfd70f65da2c3dc26395019e5e4d5a94acdeea4dec6a
font_01_sfnt_off0001759e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1759E 11616 bytes
SHA-256: 3b2a4a90ae4a19a256c3dd190b8c0c56c104d8ca01a294fa93cc1f73e99dfcf2

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