Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ad3c5c4a428818…

MALICIOUS

PDF

79.5 KB Created: 2021-02-20 13:46:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0211bf94da970a462c81d5e94a8deefd SHA-1: 246bf38d2538f9a33a4efd292133e373ab4f1362 SHA-256: 80ad3c5c4a428818f45dd13e2257552ae81e8a4c6ede1e25cbfb3ab2be5db199
126 Risk Score

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. The heuristic firings point to the document acting as a link farm, directing users to numerous external URLs, with one notable URL being 'https://bologen.ru/wix?keyword=shop+and+save+check+cashing+policy'. Although no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest it is designed to redirect users to potentially malicious sites, possibly for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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=shop+and+save+check+cashing+policy PDF link annotation
    • https://xekigumi.weebly.com/uploads/1/3/0/7/130776031/takukufigogitif-kotiluvivinudu.pdfIn PDF document text
    • http://reduslim-shop.website/altova_mapforce_enterprise_edition_freecwj3z.pdfIn PDF document text
    • http://safetymirrors.xyz/zunizuzusajopofanekaper88owq.pdfIn PDF document text
    • https://wikumegi.weebly.com/uploads/1/3/1/4/131407968/kujide_zologe.pdfIn PDF document text
    • http://letgtma.bid/crashlands_beginner_guideaulse.pdfIn PDF document text
    • https://vivuguduwidu.weebly.com/uploads/1/3/2/6/132681484/7475212.pdfIn PDF document text
    • https://cdn.sqhk.co/lutuganoda/jYhcii1/contract_killer_sniper_hack_apk.pdfIn PDF document text
    • http://marafonsport.site/rofugen4lvfs.pdfIn PDF document text
    • https://xosipepimebat.weebly.com/uploads/1/3/2/6/132682768/75bee0669b58f.pdfIn PDF document text
    • http://abzac.me/95321375052oqpjs.pdfIn PDF document text
    • http://sreview.online/62131403669wdww8.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/eOyihhx/kievan_rus_world_map.pdfIn PDF document text
    • http://shtangye.xyz/xitagopits3ts0.pdfIn PDF document text
    • http://ipai.online/samsung_smart_tv_un40eh5300_firmware_updateocvj1.pdfIn PDF document text
    • http://raisinslabs.club/154573481617qmc8.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/HGjbfmk/soperebinave.pdfIn PDF document text
    • http://magic-spring.com/xutavugd2vj.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
    • https://s3.amazonaws.com/nilititonawafim/marvel_future_fight_reddit_beginners_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/mukemasadaz.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/bopononovekesez.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/60217314685.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_off0000ec55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC55 5276 bytes
SHA-256: ffbe4c9b044a37b2c86cae5049149ecce63a4e89a74a2b6f96da4414c6ada741
font_01_sfnt_off0000fe34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE34 10556 bytes
SHA-256: d863090a1f9892d115980f51b29bcae19f782d60f74a120214548f4ff6412050
font_02_sfnt_off00012241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12241 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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