Malicious PDF — malware analysis report

Static analysis result for SHA-256 53bec6cd2e521a8b…

MALICIOUS

PDF

77.8 KB Created: 2021-04-04 10:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6dc6c81647a12aaf14af8c32a79e07c7 SHA-1: d97d215a3cc813daeed530465bfd393895fb8546 SHA-256: 53bec6cd2e521a8bcd8e2734d4b4c216aee01ff55424eac21b800ce65cd30d6c
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 0.9991

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=aviva+method+pdf PDF link annotation
    • http://zefutuwukeras.getenjoyment.net/10896286915.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/CXifign/simavigifalijaxixos.pdfIn PDF document text
    • http://zebozewazogaso.scienceontheweb.net/gomebugasotusabogota.pdfIn PDF document text
    • https://cdn.sqhk.co/joxusozomilo/dgfhfhf/muslim_daycare_mississauga.pdfIn PDF document text
    • https://vigobekopu.weebly.com/uploads/1/3/2/3/132302998/9609164.pdfIn PDF document text
    • http://bachanalytics.com/79289378292ta88b.pdfIn PDF document text
    • https://cdn.sqhk.co/timemowab/jaQHLgi/53977213080.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/7500514.pdfIn PDF document text
    • http://greatmasters.biz/55954994741y5f5s.pdfIn PDF document text
    • https://xudujebu.weebly.com/uploads/1/3/6/0/136090205/kulok.pdfIn PDF document text
    • http://lagejarejitog.mypressonline.com/genetics_file.pdfIn PDF document text
    • https://toleminifuf.weebly.com/uploads/1/3/4/0/134017029/refalenulilawiguz.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/HNgg0iL/kutasikoxas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/51558551004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18abbbfe-fee4-4efc-8562-d495b385de4a/wuganofanetofijalama.pdfIn PDF document text
    • http://pijosufun.myartsonline.com/kabuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca9e4f94-0e0f-4325-bb2a-ec28eab5ea15/88860505458.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/kazifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31ebc2c2-1418-4387-a784-56d54dfa0625/medieval_2_total_war_40_units_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/swarm_intelligence_principles_advances_and_applications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df047fc-c96d-400b-b8de-6466600677d0/31853553583.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/fozalexufas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852fd8d7-da88-41d4-ab75-57e71e11b352/jenekosubavaredeniwufavob.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_off0000e92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92A 5024 bytes
SHA-256: d97618e12bfbc61aca97a5bd1cf9861bcdb05f1a75d8a84a860cccf251f73c6b
font_01_sfnt_off0000fa23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA23 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off000102b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B1 11112 bytes
SHA-256: cdace87a399c0b2f7d3df70a199b88dee6eed77c00d7910cd074113fe82a2066

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