Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f73a569abfa7042…

MALICIOUS

PDF

90.9 KB Created: 2021-03-19 10:53:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e5498fd6762df8c1201ea163cff5d418 SHA-1: 34c6df05c67547da3746814f35e2576b9a08caa4 SHA-256: 7f73a569abfa70422e45d129c2a31b352b3849aa062189b6932123b86594d10f
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 0.9995

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://fokemale.ru/123?utm_term=pengertian+kebutuhan+dasar+manusia+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465000/normal_5fdb6c581f3cd.pdfIn PDF document text
    • http://setopin.mypressonline.com/sarega.pdfIn PDF document text
    • http://golosa-spasibo.ru/444566622632wlmg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478951/normal_601d6cc2d33d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377101/normal_5fdb5e39268ab.pdfIn PDF document text
    • http://hookup153.fun/3378025113heic9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480748/normal_60405a25e756e.pdfIn PDF document text
    • http://yognat.space/36458265421eei74.pdfIn PDF document text
    • http://ru-dev.xyz/dabeluraxiwupeligevonij3eaz8.pdfIn PDF document text
    • http://hardcreditcheck.info/hp_laserjet_p4015n_maintenance_kit_resetkuh4r.pdfIn PDF document text
    • http://pribor-poverka.site/path_painter_voodoo1i5v2.pdfIn PDF document text
    • http://byt-upak.ru/lfs_s1_s2_unlocker_download1htvr.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/serogajugomiji/cisco_9500_switch_installation_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6284b9bb-c7fd-40f8-85b1-fee8430c9082/82711678517.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/95528350994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/853c25b2-a293-4eba-8084-8af9a3189b84/22550354959.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/37168095881.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/misadezikarozibisofevo.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/godfather_moe_greene_death_scene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a25f95a-ec2e-4feb-983a-a3996117e04a/neburuka.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/bow_tie_pasta_with_chicken_and_peas.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_off000118a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A2 5400 bytes
SHA-256: 15ff3013726f61268aaac3c5584196132166807fc54e9a33dd42224ec2644336
font_01_sfnt_off00012abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABF 10832 bytes
SHA-256: f1b865c2106eec95f07d7b647c6d918bc01328bd9d2c40728a4529005dbf1ab0
font_02_sfnt_off00014fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FED 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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