Malicious PDF — malware analysis report

Static analysis result for SHA-256 257cde3c5675b1d5…

MALICIOUS

PDF

74.7 KB Created: 2021-04-03 18:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 980c41ef7cd5c720794054fffaaf6096 SHA-1: b9a9b968cf2a1c1cc70a51761498c1eac8531b50 SHA-256: 257cde3c5675b1d52f8226fbfde64ded00757259f2b9a9dda977674a16c8717b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wix?keyword=innova+dog+food+canada PDF link annotation
    • http://mikazuxo.mypressonline.com/gupiwalosawujololif.pdfIn PDF document text
    • https://cdn.sqhk.co/gikasiful/cBLGbja/video_helper_firefox_crack.pdfIn PDF document text
    • http://xepuxupipe.mywebcommunity.org/glass_sword_quotes.pdfIn PDF document text
    • http://jidapuxedepu.medianewsonline.com/44432154109.pdfIn PDF document text
    • https://cdn.sqhk.co/sirojenu/jcHOMNa/best_minecraft_live_wallpaper_app_android.pdfIn PDF document text
    • https://cdn.sqhk.co/kuniremolu/ie5ihjd/defying_gravity_movie_cast.pdfIn PDF document text
    • https://lomizagufefeg.weebly.com/uploads/1/3/4/0/134096038/setevelejop-sitepav-rurorudipi-najuwifunuliza.pdfIn PDF document text
    • https://cdn.sqhk.co/rufadexu/Ggdhcu0/17067998688.pdfIn PDF document text
    • https://bogagabav.weebly.com/uploads/1/3/5/3/135305267/kilike.pdfIn PDF document text
    • http://tigibisolefora.mygamesonline.org/34573095396.pdfIn PDF document text
    • https://cdn.sqhk.co/zirigajer/8ia3gBz/how_to_write_a_proposal_letter.pdfIn PDF document text
    • http://pubofumoxo.scienceontheweb.net/netizens_in_cyberspace_active_citizenship.pdfIn PDF document text
    • https://nepejudakolop.weebly.com/uploads/1/3/4/8/134876169/5690678.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1a82871-ea75-4fa2-b7d6-334b583fa916/survival_kit_backpack_bag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/696be3b1-380c-4076-9237-6a793c3a38aa/76957391137.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/firefox_42_filehippo.pdfIn PDF document text
    • http://pavabiza.atwebpages.com/75430965885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/035523f0-db8c-420d-927b-fdff16060a69/deadweight_loss_practice_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8593cf7-fdbf-4654-9c34-a0a8039190c9/woribor.pdfIn PDF document text
    • http://buzanuziti.myartsonline.com/neruz.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/26677080778.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/tofawofukiwelafuz.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE779 4880 bytes
SHA-256: 860e9e3097fb47fd239afbfc42615eb017952e38573efc85996d258de5f342d7
font_01_sfnt_off0000f83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83E 11104 bytes
SHA-256: 91c0b9054b8d19afc809331385fa88f3c70cc930c4840c7870ecdc77e9a11340

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