Malicious PDF — malware analysis report

Static analysis result for SHA-256 93cc2fabb0b19748…

MALICIOUS

PDF

82.4 KB Created: 2021-06-13 11:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c945148e1af07a398886647834ac59c6 SHA-1: a81e768333c5b21f9b315316642fb44f91d900da SHA-256: 93cc2fabb0b1974816f5138e40e8edc2e8e4b8919f48e4bbac87887714b00671
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to obscure malicious destinations. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/pbw?utm_term=ppsspp+gta+5+file+download+android PDF link annotation
    • https://xufiporugagom.weebly.com/uploads/1/3/4/7/134705457/banaxosagideke.pdfIn PDF document text
    • https://rotemewan.weebly.com/uploads/1/3/1/3/131380756/wenoxapafozokiz-mepedowajami-gilisazusefel.pdfIn PDF document text
    • https://zudesamuz.weebly.com/uploads/1/3/4/6/134689191/foserodokonefuza.pdfIn PDF document text
    • https://vumifedesonuzik.weebly.com/uploads/1/3/4/8/134849268/fikugosefaronodemu.pdfIn PDF document text
    • https://zobovakobazazu.weebly.com/uploads/1/3/4/3/134319401/fuzixa.pdfIn PDF document text
    • https://xutogimumunode.weebly.com/uploads/1/3/4/3/134375265/3799168.pdfIn PDF document text
    • https://gebobofivogaxe.weebly.com/uploads/1/3/5/3/135308574/6cfc9186f18.pdfIn PDF document text
    • https://sojujigun.weebly.com/uploads/1/3/0/9/130969910/latigumebeboto.pdfIn PDF document text
    • https://xomikevogonenoj.weebly.com/uploads/1/3/4/7/134743799/guxex.pdfIn PDF document text
    • https://diwujuxopawarow.weebly.com/uploads/1/3/0/8/130874606/4067281.pdfIn PDF document text
    • https://mubojage.weebly.com/uploads/1/3/4/3/134377346/revomomevap.pdfIn PDF document text
    • https://nimizinimaji.weebly.com/uploads/1/3/4/7/134703428/jetirekatav_rilesakef_tapixugovopos.pdfIn PDF document text
    • https://kazirevuteguzug.weebly.com/uploads/1/3/2/6/132681824/e1f780ad698b7.pdfIn PDF document text
    • https://nozudepoget.weebly.com/uploads/1/3/1/1/131163917/40e48898ae0adc3.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://zusemivak.pbworks.com/w/file/fetch/144678165/96677255888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4926f730-4451-4810-98ac-cc3d2fd9f4c1/7604413802.pdfIn PDF document text
    • http://xefuvut.pbworks.com/f/96049338234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba9752e3-1595-4b17-ae28-3afe1de1e016/walmart_black_friday_2020_ad.pdfIn PDF document text
    • http://sozegajamuf.pbworks.com/w/file/fetch/144781983/emulation_ritual.pdfIn PDF document text
    • http://xutipofapu.pbworks.com/w/file/fetch/144549312/rikakavunowoxir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebf2b2e8-c8df-4802-b6c4-c1b3bd23c7dd/pexogetelupan.pdfIn PDF document text
    • http://sinorodolu.pbworks.com/w/file/fetch/145211940/91696951226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e92e1f96-8dda-4aa4-9b29-894f944bd791/is_lexus_f_sport_worth_it.pdfIn PDF document text
    • http://fijokawowe.pbworks.com/f/53161620770.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/f/foxirumanajevebo.pdfIn PDF document text
    • http://matekid.pbworks.com/f/libros_del_rincon_descargar.pdfIn PDF document text
    • http://werinenimuta.pbworks.com/w/file/fetch/144517926/getanamegaveximajafazoxo.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.

FilenameKindSourceSize
font_00_sfnt_off0000f4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F3 5216 bytes
SHA-256: 24ee8c5b0a949d9c6a2327bd7fdfaa8e17589ca7ed13eb64e271f36c8bffcb1c
font_01_sfnt_off000106cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CC 10744 bytes
SHA-256: ff0f7ab46ce3bbe11b120fac7c5bc33606718af74d1f5a251022e5fc39c4418d
font_02_sfnt_off00012b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B87 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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