Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2d900082a23f44…

MALICIOUS

PDF

108.7 KB Created: 2021-04-05 09:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b2f98bd958265f131b89728d84e08bd3 SHA-1: 7c81aa902f143f6a7dd240fa86c6fef90e06c225 SHA-256: 1a2d900082a23f44ce993881e7ed266bd328764163f6413f71b90533bfc91ad5
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the heuristic findings point towards the document's primary function being to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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
  • 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://golowaki.ru/award?keyword=peter+pan+pdf+script PDF link annotation
    • https://zumegopepotiko.weebly.com/uploads/1/3/1/3/131398003/7690366.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/dewutitaxarovi-fudilonapirup-pimonodo.pdfIn PDF document text
    • https://zasevolonuto.weebly.com/uploads/1/3/5/3/135335071/gutunozova-xenuge-xowazaj-nofomafadira.pdfIn PDF document text
    • http://baugroup.info/dark_souls_3_dlc_reviewoep1v.pdfIn PDF document text
    • http://websporizle3.com/coloring_sheets_spring_flowerskscwu.pdfIn PDF document text
    • https://fumevido.weebly.com/uploads/1/3/0/8/130874276/9082105.pdfIn PDF document text
    • https://rejejowurodesom.weebly.com/uploads/1/3/1/3/131398559/womekube.pdfIn PDF document text
    • https://kagexafezadasu.weebly.com/uploads/1/3/4/3/134318935/6779958.pdfIn PDF document text
    • https://kowokilu.weebly.com/uploads/1/3/0/7/130740572/4204153.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/zemidimevar-gesaji-folofokixadexut.pdfIn PDF document text
    • https://funesovikigaje.weebly.com/uploads/1/3/0/7/130740183/6303d5731d17e.pdfIn PDF document text
    • https://muxasikij.weebly.com/uploads/1/3/1/8/131872285/lemafi-ruxejavogufib-derosunal.pdfIn PDF document text
    • https://favipipuwebex.weebly.com/uploads/1/3/5/3/135397367/nepelo.pdfIn PDF document text
    • https://kuwugexikoxol.weebly.com/uploads/1/3/4/7/134718068/ritori-xukedoter-buwiwobikir-piridoduxitemi.pdfIn PDF document text
    • http://hookup756.fun/734104754753uh8m.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/907437531871rwvo.pdfIn PDF document text
    • https://silajawa.weebly.com/uploads/1/3/4/3/134339193/2143830.pdfIn PDF document text
    • http://bettermoneytips.com/faceapp_pro_apk_cracked_iosnsk2x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kofabube/libro_el_juego_del_angel_de_carlos_ruiz_zafon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/097a908c-8a46-4b06-ab56-9e2a6bd739e0/scribus_tutorial_video.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/swarm_simulator_android_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e379137-c3b9-4bd5-a720-ff3460381151/subitezelixov.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/mejifamilavavenebij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eda9774-4356-47f9-9027-ad955eabb081/17737291884.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E37 5116 bytes
SHA-256: b4182d5e97e79919e6b7d8f6912033761e0df09c27bc92056b1ff8dadf7f08b8
font_01_sfnt_off00017fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FAC 10992 bytes
SHA-256: ed2dbe28b352faeb8ee578cbf71dd968aeb212209f0a13c5b91277ea70ac164e

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