Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b3676d16a0b01eb…

MALICIOUS

PDF

79.7 KB Created: 2021-04-30 23:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0e7077ccdab2e00243d417135dc9b9fa SHA-1: d4c32c1684d3743ecd1760b146b7a675f0b02227 SHA-256: 0b3676d16a0b01ebab127f01bf2d39e9540fbc3b5d138bff144045da8f1eb4c1
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 0.9993

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://maypoin.ru/strik?utm_term=fender+mustang+iv+v2+specs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461525/normal_603ad4ab3d25f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393181/normal_605af14735d1e.pdfIn PDF document text
    • https://cdn.sqhk.co/noretokujazo/LghUE5R/lewezomuwaverulakub.pdfIn PDF document text
    • https://cdn.sqhk.co/gagunewatevo/hO0gcKM/esp8266_datasheet_timer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454684/normal_606d5851ad9d0.pdfIn PDF document text
    • https://cdn.sqhk.co/romumoxoleno/nWjcUgh/the_sims_mobile_hack_apk_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/motuwezelu/IjbLRja/netflix_party_on_iphone.pdfIn PDF document text
    • https://difanewoxapazu.weebly.com/uploads/1/3/5/3/135321324/5323233.pdfIn PDF document text
    • https://ribifafugulif.weebly.com/uploads/1/3/4/6/134650062/zinudubaroped_pibekor.pdfIn PDF document text
    • https://waxopudiva.weebly.com/uploads/1/3/4/6/134695928/2487356.pdfIn PDF document text
    • https://buvosaxemapo.weebly.com/uploads/1/3/1/4/131437370/72fd865faa81.pdfIn PDF document text
    • https://vosuzujil.weebly.com/uploads/1/3/2/6/132681517/wogejuridoti.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/gijihdg/talking_ginger_at_3am.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410441/normal_601fafa36a71b.pdfIn PDF document text
    • http://zumepaposakuf.scienceontheweb.net/henry_the_5th_shakespeare_movie.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/salesforce_lightning_component_development_tutorial.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tifilow.onlinewebshop.net/21_cfr_part_10_and_11.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_e9819443254b40f986c06eb54794c730.pdf?index=trueIn PDF document text
    • http://bojepudadadax.atwebpages.com/99126067630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/323903f3-57c8-4db3-80d7-022777cee4a6/36539715178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00245e32-a5c9-432a-8697-8d551652aed0/huckleberry_finn_movie_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c66e23e0-82db-4d65-b143-43ab81493554/parrot_ck3100_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e19b33b2-7590-4757-9665-2f7005b53954/lexus_es300h_2014.pdfIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_08a9464b471046e991cc4af24084f7b7.pdf?index=trueIn 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_off0000f75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75F 5508 bytes
SHA-256: adf31a62e65cc26bdd1690872776408678ea28d2940b475d22bc1c00142d23f9
font_01_sfnt_off00010a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A10 11600 bytes
SHA-256: b07b319b8c4aa0807566ba3076c59543fca6ea592beda0df556b9bebb4cb9760

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