Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f437d5329a5ebf…

MALICIOUS

PDF

40.0 KB Created: 2020-11-03 04:46:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0932a4474953570d9528430b154c5576 SHA-1: 2a28ad37428cbf4dd6f41d42528205ef45ce8d00 SHA-256: 65f437d5329a5ebfb8b0e3f5be63b8ff7abf5fe01777ffcdef2ed60f82aff295
170 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a lure promising a free service manual download, which redirects to a known malicious URL. The document body and embedded links suggest a link farm designed to drive traffic to malicious redirectors. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious redirector campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/123?keyword=free+service+manual+download+for+motorcycles In PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/xoxerejalud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419211/normal_5f9ff029cd88e.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/zezojenada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3680/5800/files/buwemasuwakajawiserazuluf.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/bituzofaforiwipinud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1227/6391/files/24710740067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4458/7688/files/kerovabovesitojisim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb982df0-2b2a-4972-a69f-1efc89bcbc55/kupuzese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7326/6352/files/bamu_phd_progress_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/lurofufudez.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_off00005f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F88 5376 bytes
SHA-256: b59b995c165654caeca58819a41302c6917bdd2d7573e7a62e1b965cbc3ad940
font_01_sfnt_off000071d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D7 9828 bytes
SHA-256: 5c7ee83ec3713097a5de20f63d48ffcbf0e91467f198de047a12cc6a7936cfba

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