Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd7d3b7561b2b33…

MALICIOUS

PDF

73.2 KB Created: 2020-12-04 02:50:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5d0860fb6fd7481a4e6c888361a31476 SHA-1: cb916d09222bf74e3fdfc34a57cae33ae2bc726f SHA-256: 3fd7d3b7561b2b33a0d9c8c140093d986995ce381ba574f89ba151eaa8f2d1d3
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external PDF links suggests a link farm or redirection strategy, potentially leading to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=section+8+hawaii+requirements In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_5fbf283ec4e78.pdfIn PDF document text
    • https://filafibiwi.weebly.com/uploads/1/3/4/3/134316544/bawip.pdfIn PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/5653360.pdfIn PDF document text
    • https://moviwinexanasi.weebly.com/uploads/1/3/4/3/134314602/90fae0ec66ae.pdfIn PDF document text
    • https://dudererojafa.weebly.com/uploads/1/3/4/3/134362298/fowufekite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415946/normal_5fb256e195a10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aef4a9a-9293-4b37-86cb-7f442a99a58d/lexicon_alpha_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/android_device_manager_change_lock_screen.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/nazifalilumulutanama.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/62612443391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29148926-f882-4810-b3cd-c70290f0a5c9/mobuvusibezuge.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37ef588c99b6d37b7af64/t/5fc4f77ef3de5e49b5011531/1606743934650/81035858888.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c1ca2bbd74065805c248/t/5fc476073c02f22b9d9bd80a/1606710792925/68611998723.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/biogenetic_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/37578799269.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/bixesutokasigewawixejada.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/18552449382.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CA 5520 bytes
SHA-256: 9063bd2f1c865725114bcb12833a5feee18d2187b3097d8c38da18efb176520d
font_01_sfnt_off0000f381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF381 10488 bytes
SHA-256: d6a5167ded6fcb90ffecccfac79dc963068c079ab12e2885ab5fd0ebe7578c11

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