Malicious PDF — malware analysis report

Static analysis result for SHA-256 86ccbbaf9ff0fe60…

MALICIOUS

PDF

85.5 KB Created: 2021-01-08 04:34:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d527888306fd45dbfb7ba50db3d75292 SHA-1: 515779e0bb59926e32db36d180f43024b43ac4dd SHA-256: 86ccbbaf9ff0fe606f8bcf87ab0bb0bbadffb76dbdb162d3ff3489a0ef5812ea
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous external links, a common tactic for phishing or scam operations. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with one pointing to 'trafffe.ru'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

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 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.
  • 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://trafffe.ru/123?utm_term=lingua+latina+exercitia+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369317/normal_5f8c9475a9fe2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496013/normal_5fdeea0ca9d52.pdfIn PDF document text
    • https://nimimemuxigu.weebly.com/uploads/1/3/4/4/134488465/ratitaxeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374700/normal_5fc8018a912de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426423/normal_5f97dde7440a5.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/salade/axis_and_allies_1914_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/sorcerer_s_apprentice_theme_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/3rd_person_singular_printable_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/31763320744.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/55922663848.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/65853375871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ed8006c-6692-48e2-b0f1-64405a2bacbb/classic_design_concepts_light_bar.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_off0001013e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013E 5008 bytes
SHA-256: b234a21bb3af6b7816df42eb72689e00275139f00687def379cab7263be5aa33
font_01_sfnt_off0001126e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126E 12480 bytes
SHA-256: 803e4c8092eb6273c3fe15dec2589e0f57d3426087687ff9d4a3f7565be79a43
font_02_sfnt_off00013b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B0F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.