Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc0a19b2144150cc…

MALICIOUS

PDF

39.1 KB Created: 2020-10-28 19:00:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e81727c81a879c2752895d799fc06fd4 SHA-1: 9586fbefecfb641dfc82dd9d6cd61f3309ab2f82 SHA-256: bc0a19b2144150cc91a4c7328f1a56f06e51f8fb8406c7eb6247d1a7640584a6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ttraff.com/123?keyword=diary+of+a+wimpy+kid+double+down+free+ebook In PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/9022684.pdfIn PDF document text
    • https://kobizixudowizeb.weebly.com/uploads/1/3/4/4/134402546/rawikoduvikumuwaweli.pdfIn PDF document text
    • https://pikofejuja.weebly.com/uploads/1/3/4/4/134478885/1101219.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/duloxowok.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/32de67401d0371f.pdfIn PDF document text
    • https://lejigatoni.weebly.com/uploads/1/3/1/8/131871980/7476327.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/sotorirazajedi-turajotatufa-rosuw.pdfIn PDF document text
    • https://kalodobig.weebly.com/uploads/1/3/4/4/134432105/vemojipikide.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/3641505.pdfIn PDF document text
    • https://zifidobu.weebly.com/uploads/1/3/4/3/134371145/nufojilabegajef.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/4933041.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://cdn.shopify.com/s/files/1/0500/5882/1796/files/lugosugitalikesikobux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5512/3105/files/tresiba_insulin_starting_dose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6555/5099/files/gson_parse_json_array_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce0ec348-da4e-466e-ae34-357684f796b1/kigewaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8956/3299/files/89157522560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0726/1341/files/jpg_to_converter_apk_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c411df49-0430-4bde-86a0-70c46e17641c/34054370153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8354/4772/files/major_depressive_disorder_nami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1428/1625/files/pigox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1731/2152/files/bawototogefodasuv.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

Related samples 8

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
font_00_sfnt_off00004ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CE4 5208 bytes
SHA-256: fefb9c06b4b937725ccf2e20828914dd4dacdad64c4aa51fc0b900f6bef5ea98
font_01_sfnt_off00005e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8E 9920 bytes
SHA-256: 7a3a52168838db3c288ac8e8ccd40997b1edf69833eb65591563e98921f96a20
font_02_sfnt_off00008074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8074 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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