PDF malware analysis — malicious · 52605bcef3c0ff25

MALICIOUS

PDF

77.5 KB Created: 2021-02-18 05:48:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07

MD5: c1aeb3d6f0e8cc63a6994632453326e1 SHA-1: cbc799d79b6cac1ae38b5d4df287ae65ca61c0cc SHA-256: 52605bcef3c0ff2578e14c8e9e1da193a907ae9d25e2038a613e3a25daf031e9

226 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 of which are hosted on disposable domains, indicating a link farm or SEO spamming operation. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the document's content is designed to trick users into believing there are new or changed bank instructions, a common phishing tactic. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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.
Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE

Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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/strik?utm_term=is+acura+ilx+expensive+to+maintain PDF link annotation
- http://vinograd.io/zafabotowunidutopoemls7.pdfIn PDF document text
- https://sefizofemaj.weebly.com/uploads/1/3/4/2/134266575/nifaruxefarevegufo.pdfIn PDF document text
- https://xivunububan.weebly.com/uploads/1/3/0/9/130969166/tipem-nifukogovemer-setemulaza.pdfIn PDF document text
- http://nextauto02.ru/dalamutenosaxpdtw.pdfIn PDF document text
- http://ig-copyrighthelpcenter.com/payment_coupon_template_excelapv22.pdfIn PDF document text
- https://bukivobiwizu.weebly.com/uploads/1/3/4/0/134097020/bodoxekide.pdfIn PDF document text
- http://avit0.cc/cross_stitch_alphabet_templateoadnd.pdfIn PDF document text
- https://nigenodesi.weebly.com/uploads/1/3/4/4/134480521/xutowegutofulijafuko.pdfIn PDF document text
- https://bapefakujina.weebly.com/uploads/1/3/4/4/134483882/zuxogab_tibiliwovul_sufedo_mofapalutomipa.pdfIn PDF document text
- https://wejatinolu.weebly.com/uploads/1/3/1/4/131438249/nefovuxagutaz.pdfIn PDF document text
- https://sodikisug.weebly.com/uploads/1/3/1/4/131437766/2312843.pdfIn PDF document text
- http://xojopimo.22web.org/18070328468.pdfIn PDF document text
- https://rinavufapakoto.weebly.com/uploads/1/3/4/4/134460237/9110276.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://bolizubixekop.rf.gd/bofufenamabewiger.pdfIn PDF document text
- https://s3.amazonaws.com/jifedefujodu/53031904854.pdfIn PDF document text
- https://s3.amazonaws.com/defipedibe/tamil_new_movies_tamilrockers_hd_2019.pdfIn PDF document text
- https://s3.amazonaws.com/wazagidonux/bar_louie_brunch_menu.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e496.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE496	5028 bytes
SHA-256: `20eb1c46f5f50678673c6e92f91c3fb78516514ae26d54329b8a66f2f9489ffa`
`font_01_sfnt_off0000f590.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF590	10836 bytes
SHA-256: `4bfb06bb3b51e701cc5750b808005494339d35a5cb4355302b2732ed104f6cb4`
`font_02_sfnt_off00011a68.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A68	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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