Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7070ab7781dc853…

MALICIOUS

PDF

63.0 KB Created: 2021-02-12 19:26:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c80acb021dee659447448063bf5f4fec SHA-1: d9fc23a19598ba0722616ef5d03c3f924f3928a0 SHA-256: f7070ab7781dc853ee3db518600ac63ca2fb9cae78a62ca356db0c7d05561f93
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and embedded URLs pointing to various domains, suggesting it functions as a link farm or a distribution point for further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document as a link farm on disposable hosting, reinforcing the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://bologen.ru/wix?keyword=chapter+14+land+test+answers PDF link annotation
    • https://cdn.sqhk.co/wevexifimur/ckigKlK/frogger_ps1_ost.pdfIn PDF document text
    • http://koteyarn.moscow/sikatatuzovuba0c8t5.pdfIn PDF document text
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/2591382.pdfIn PDF document text
    • http://liko-sneakers.com/good_food_guide_melbourne_voucher85ez6.pdfIn PDF document text
    • https://lewuseloti.weebly.com/uploads/1/3/1/4/131437615/wijudegixoz_xowipuwelariw_dufivaw_doxogezad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448740/normal_5fe097b5e5f43.pdfIn PDF document text
    • https://davabodijesofid.weebly.com/uploads/1/3/4/4/134474123/5553369.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/icmqhcQ/aladdin_king_of_thieves_full_movie_dailymotion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413375/normal_6020fc7b67d96.pdfIn PDF document text
    • https://cdn.sqhk.co/wujukipako/gfgdhdy/2_chainz_lil_wayne_money_maker_mp3_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404502/normal_5fe3b5db5f68f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487399/normal_5ff7fbc5ed706.pdfIn PDF document text
    • http://nakrutkavk.site/libro_semiologia_medica_de_cediel1jcza.pdfIn PDF document text
    • http://lnstagrambusiness.com/playbill_example4l833.pdfIn PDF document text
    • https://lipuxavevafip.weebly.com/uploads/1/3/1/3/131398459/kemafugoredomam.pdfIn PDF document text
    • http://itprod.space/make_your_kid_a_money_geniusp7shn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487894/normal_5ffab7cbe9c28.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/eiaKj5u/vumidasubebunuduxalubik.pdfIn PDF document text
    • http://help-copyrighteamservice.com/dujexefabujosuwopusudotvl9.pdfIn PDF document text
    • http://helplnstagram-confirm.com/82975748254iywc9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bajokekez.epizy.com/good_golly_miss_molly_sheet_music.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_off0000bc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC63 5184 bytes
SHA-256: 1d26770d3f54499610d4fe7ecfd82e59c8e16dd400747e1af9d8b2b0ac5ffeb0
font_01_sfnt_off0000ce0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0D 9740 bytes
SHA-256: 5755d9f59bfa4e330e36675a6a4b63ecddf69cf3ab41f6b77e5726929409f42e

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