Malicious PDF — malware analysis report

Static analysis result for SHA-256 259a737a01e8226d…

MALICIOUS

PDF

68.9 KB Created: 2020-11-29 18:34:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2c81a2036e8980126dfcee617d760398 SHA-1: 58335cf69877f8b4dbc3d02b77a6bec59342f1c9 SHA-256: 259a737a01e8226d04153bbf3bad20e9229f9747cc297f8010a42d08743a0cc7
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagging it as a redirector and a link farm. It contains numerous embedded URLs, with at least one pointing to known malicious infrastructure (traffking.ru). The document's purpose appears to be to lure users into clicking these links, likely leading to phishing pages or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffking.ru/123?utm_term=the+giver+in+spanish+pdf In PDF document text
    • https://jajewivazag.weebly.com/uploads/1/3/4/4/134491582/c04b2d2ebcd5.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/niduv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392209/normal_5f9ab8b0420ea.pdfIn PDF document text
    • https://pujatimosu.weebly.com/uploads/1/3/2/6/132681823/lepojezapijogedagu.pdfIn PDF document text
    • https://lemurowivavaxub.weebly.com/uploads/1/3/4/4/134404776/4291103.pdfIn PDF document text
    • https://ferateritilew.weebly.com/uploads/1/3/4/2/134265971/muwuxedexu.pdfIn PDF document text
    • https://wetifojijebene.weebly.com/uploads/1/3/4/4/134474841/zataxajavowoluxini.pdfIn PDF document text
    • https://volamajujidek.weebly.com/uploads/1/3/4/6/134667755/januwoxuzufu_xafez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5f88ec388da8e.pdfIn PDF document text
    • https://tuwikoli.weebly.com/uploads/1/3/4/3/134312541/1599590.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/fa879ffa-1177-49ce-bacf-e262db7f03a1/zuwujudujovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b74e4e9-9e2d-40a6-b70d-3053d3b662b5/setofirotakakefututa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c5b1cbd-9d93-4f73-91d0-629ef8b32d40/vebokerefawagoderovuxep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d57f891-a15c-410e-8973-c2cb2a1aa925/jazumuxozogisifuvutunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e016a698-8d64-48d7-ba11-1766d0dcb61b/68458328626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/077dbc6b-5a54-434b-82b0-98f5088115fb/36178538508.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_off0000c503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC503 2900 bytes
SHA-256: 9c84aca5171cf4522e1fd23f3e5391e17c8e645cdcb740b4c3036af6865bd014
font_01_sfnt_off0000cf48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF48 5280 bytes
SHA-256: 6baefc7065ce572bc6a766605ce3428b01b3ccf968b75f7c707f625fde854f25
font_02_sfnt_off0000e144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE144 11056 bytes
SHA-256: 6a634687655ccc62df24e0df692591b051d87839c7b3f4f1745fb2f8b9c64cde

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