Malicious PDF — malware analysis report

Static analysis result for SHA-256 a052de0bbbfe9a1c…

MALICIOUS

PDF

78.2 KB Created: 2020-12-18 11:26:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 07314a8295e6e237b51b89e1ea1a3ead SHA-1: 2e34a4ac873e2440b379a02ad9eabf7b31962cc3 SHA-256: a052de0bbbfe9a1c69c882d093800b6bf7e72c05a1685874fdb602960e766d81
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are to benign-looking documents, but one prominent link points to a suspicious domain ('trafftec.ru'). This suggests a link farm or phishing attempt designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://trafftec.ru/strik?utm_term=borderlands+2+the+sham+code PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394073/normal_5fdbff1e90320.pdfIn PDF document text
    • https://taguraridefukal.weebly.com/uploads/1/3/4/4/134446716/5561380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404112/normal_5fd6411f5b648.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc10866e5c7695ca99c5cd3/t/5fca67fb69863844a54301d3/1607100414525/cbs_sports_nfl_week_12_picks_straight_up.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cd9260f2895dc1e75cb0/t/5fc0df553c02f22b9d2db278/1606475605534/comparing_sexual_and_asexual_reproduction_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cd26ef7-f584-4846-8fae-60222d2d7e07/truth_table_worksheet_doc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6ffef1969b523a41e2079/t/5fd6201bde5b1220c022b00d/1607868443686/descargar_gta_3_apk_aptoide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36ee160f2895dc1f7ed49/t/5fd60080267c8d0ace3c23f3/1607860355461/factors_affecting_academic_performance_thesis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e607df132613bbbdbdb8/t/5fc1b9e6e18c5c478e3bf563/1606531559011/ma_state_retirement_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/vuwulajudebolajolebijowe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e46f24b06a7eb3ff1788/t/5fc2d6dbe6d49a06bbf0e21f/1606604507957/gameruvigotixokax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1216c0cb-308a-4d6d-a41c-11910df974be/dakajebawanemezaduse.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000105e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x105E4 22044 bytes
SHA-256: 469757724271c6020d6df7f24e892e8f390118c36df95e372c542211d032aab1
font_00_sfnt_off0000cd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5F 5360 bytes
SHA-256: 7fdf85619c6c90ede45b7a9afa7668df4f1a1b96e6d15ccce220da9a8a25c5cb
font_01_sfnt_off0000df6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6D 11764 bytes
SHA-256: 5f50730786d205ffb38b5d15901eb36a199927edee4cdece6214aae06a44116f

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