Malicious PDF — malware analysis report

Static analysis result for SHA-256 d862f412f49e75d1…

MALICIOUS

PDF

82.8 KB Created: 2021-03-20 02:06:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d11ab4b681ae535c13e307194fb12da8 SHA-1: bd4a0befff6fc379d4dac7032154ddca2121590d SHA-256: d862f412f49e75d162e0e4af10643c2d31bac94a5fd8abf60a1f43b955fef910
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF contains numerous external links, many of which are part of an SEO link farm, and one prominent link disguised as a "search for truth bible study chart pdf" lure. This link redirects to a phishing site, indicating a social engineering attack. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://pelibifir.ru/strik?utm_term=search+for+truth+bible+study+chart+pdf PDF link annotation
    • https://wiselulusitafe.weebly.com/uploads/1/3/4/8/134892864/3346922.pdfIn PDF document text
    • https://fafafupoxojamu.weebly.com/uploads/1/3/5/3/135350358/80de4a32d9bc.pdfIn PDF document text
    • https://gemitipob.weebly.com/uploads/1/3/4/4/134474898/3dca406.pdfIn PDF document text
    • https://lunipudazu.weebly.com/uploads/1/3/4/4/134462877/f604dfb8f4a593e.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/2962195.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/vaxebisapesi/pufoterexopelamijizete.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/96875219302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f496a48e-98bd-4b7d-9a74-34033a2d2227/dotisiranuwididefepogus.pdfIn PDF document text
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_4003ca57e0f84357b29101fb2f92a3f3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/56010758682.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/90674108083.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/transitive_and_intransitive_verbs_worksheets_grade_7.pdfIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_694f88a961f14c47a37920f3a8a75aa9.pdf?index=trueIn PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_c062530cafac4e448f08e6edc1dc9808.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/95acaeaf-40b0-4679-94ba-d095a3036b01/admiral_dryer_parts_door_switch.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/aurora_lighting_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/emotional_intelligence_2.0_-_with_passcode.pdfIn PDF document text
    • https://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_2066a1848be44beda3f7e26b93ea105d.pdf?index=trueIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_7de79c63020b45599fbca589896321e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/escape_room_game_level_146_answer.pdfIn PDF document text
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_72c5aff023944497b69f3dfc8aa26457.pdf?index=trueIn PDF document text
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_19c1ab97fc5041389bf72d6d23f1303b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/440176b9-95c2-4784-9c29-5a1d5a7767ef/you_should_as_well_meaning_in_urdu.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_off0000f89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89B 5364 bytes
SHA-256: cb981ba7af49c4668f07f54d34a418507b1d7c02ecd68b33d239e2c101b5ba86
font_01_sfnt_off00010ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE5 10664 bytes
SHA-256: 814d86f978e6a98433baee6dcd6b385e07c37714e03d418dc4730b3414dd23e5
font_02_sfnt_off00012f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361