Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa65592c5be1912b…

MALICIOUS

PDF

75.3 KB Created: 2021-05-08 00:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3c6d9865028ebf11981e16a33923745c SHA-1: 74b60a3ce616f5b3518f1c72197aa3db404fcb58 SHA-256: aa65592c5be1912ba38ceda95a06610ca1c900717dbeb788daa1d89fee125e8a
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 0.9997

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://vilenefex.ru/strik?utm_term=how+to.pronounce+chakra PDF link annotation
    • https://cdn.sqhk.co/pilozarager/hj24lig/tanaduzapigeroxoxe.pdfIn PDF document text
    • https://cdn.sqhk.co/zativojor/gesjhij/latest_ringtones_2020_new_for_android_9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484122/normal_5fec07dd331e7.pdfIn PDF document text
    • https://jedexapotup.weebly.com/uploads/1/3/4/4/134472831/davigugibipirek.pdfIn PDF document text
    • http://rukozhop-guide.com/blueparrott_b250-xt_headset_best_buyyibta.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/jj8hggg/72966339996.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453734/normal_602b8258183dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410441/normal_60151230a796a.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/business_plan_for_online_shopping_website.pdfIn PDF document text
    • https://rofixuninapo.weebly.com/uploads/1/3/5/3/135313709/2d7e882bfb891.pdfIn PDF document text
    • http://glossywp.online/498428022396f15b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468551/normal_6065f4689fc38.pdfIn PDF document text
    • https://bezumovepefare.weebly.com/uploads/1/3/5/3/135337037/tojowututige_tizezusezoseso.pdfIn PDF document text
    • https://cdn.sqhk.co/jagojixego/RgfidKR/stick_run_2_beta.pdfIn PDF document text
    • http://ratixopawem.mypressonline.com/cancer_espinocelular.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/great_are_you_lord_all_sons_and_daughters_chords.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nokejufesuw.atwebpages.com/business_productivity.pdfIn PDF document text
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_0954a18270a849798073b463067dd96c.pdf?index=trueIn PDF document text
    • https://a0f1d9c0-ea46-4e0e-9383-d87711d3127f.filesusr.com/ugd/1e3fb7_b7ca3e79d5d14c61be87b367e9404dd4.pdf?index=trueIn PDF document text
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_9672f2673fe14ec39388ce0aa7985f44.pdf?index=trueIn PDF document text
    • https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_0abf102f2d284343aaa9bf450dceb968.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_off0000e782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE782 4960 bytes
SHA-256: 3e970d82ab5ba922c5192d02d4b08d1442496772d6c6993d7ea348a075fffae2
font_01_sfnt_off0000f876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF876 11960 bytes
SHA-256: cb4c4404ea30ddb4dd9c8a986b3814e300948f276441e57a1c895af79aa8f9c6

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