Malicious PDF — malware analysis report

Static analysis result for SHA-256 1221fa76c226cc65…

MALICIOUS

PDF

66.8 KB Created: 2020-11-25 00:35:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: daa27bf49144b5d9b5b0a24f1efdabdd SHA-1: 1e0a3d1ad900e439e234207031e0c0e842876253 SHA-256: 1221fa76c226cc65b36aef414b78b6a2be3895467431f04ed5eca7db2cf7ce25
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating it is likely a phishing or malware distribution lure. It contains numerous embedded links pointing to redirectors and SEO link farms, such as 'https://traffine.ru/aws?utm_term=dragon+slayer+2+guide+low+level', designed to funnel victims to malicious content. The presence of multiple PDF links suggests an attempt to create a link farm for SEO manipulation, likely to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://traffine.ru/aws?utm_term=dragon+slayer+2+guide+low+level In PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/fenixaxitimitomowub.pdfIn PDF document text
    • https://jotujovogubiraf.weebly.com/uploads/1/3/4/6/134627891/dafewiseferuwo-bogebabugi.pdfIn PDF document text
    • https://zavomafig.weebly.com/uploads/1/3/4/3/134356936/1836967.pdfIn PDF document text
    • https://gudimutukadido.weebly.com/uploads/1/3/4/6/134648046/nubipam.pdfIn PDF document text
    • https://jabezenenadako.weebly.com/uploads/1/3/4/2/134234778/7950073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5fb7a6b61bdfb.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/mefovu/vixojefex.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/cheat_hungry_shark_evolution_android_no_root.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d81b1371-deaf-47db-bf1a-715f3d4150fa/when_was_the_camera_invented.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/adobe_indesign_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/sezutuma/the_bedford_guide_for_writing_tutors.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/car_maintenance_log_template_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4b00523-2119-4d4c-8618-2fe4ae7a7a8b/1354923098.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_off0000ca79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA79 5380 bytes
SHA-256: a5984bef33c60c5999298efbd50fe5eb2897c400e70af8cae5d3a42a548759b4
font_01_sfnt_off0000dcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF3 9900 bytes
SHA-256: a02132436b8b7e3a7fb75f37201523709bb959f2ac277813f6328bc8b28ea5dc

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