Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d7adca7d23a1d5…

MALICIOUS

PDF

80.5 KB Created: 2021-03-28 16:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b64c43d425371c3301f94bfbff27bb43 SHA-1: 70489d18024be57f8019cb457d1ca3936373bba3 SHA-256: 92d7adca7d23a1d534de4ddde5699b05a8d3f9ea5c10f45eb08c625e52b99dd8
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a phishing/trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The document body, though heavily garbled, appears to be a lure related to 'Adobe Illustrator training manual pdf'. No scripts were extracted, but the presence of numerous external links points towards a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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.
  • 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://nipisod.ru/award?keyword=adobe+illustrator+training+manual+pdf PDF link annotation
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/2904238.pdfIn PDF document text
    • https://wegakerovosa.weebly.com/uploads/1/3/0/8/130873826/ff5049872802b00.pdfIn PDF document text
    • https://jinajifija.weebly.com/uploads/1/3/4/8/134889339/4678663.pdfIn PDF document text
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/3efac51a.pdfIn PDF document text
    • https://godobinoka.weebly.com/uploads/1/3/0/8/130815080/kikozab.pdfIn PDF document text
    • https://nebomigefut.weebly.com/uploads/1/3/4/3/134359696/ruxageden.pdfIn PDF document text
    • https://lazimepirurela.weebly.com/uploads/1/3/5/3/135350713/vigaromipadiseseva.pdfIn PDF document text
    • https://poxesaxe.weebly.com/uploads/1/3/0/7/130738711/xivesowokuvesu_jinet.pdfIn PDF document text
    • https://ripufimavewin.weebly.com/uploads/1/3/6/0/136099474/160343.pdfIn PDF document text
    • https://kofagegupuk.weebly.com/uploads/1/3/2/3/132302723/dijipoviritakosibo.pdfIn PDF document text
    • https://pamimimafe.weebly.com/uploads/1/3/0/7/130775080/688081.pdfIn PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/zukarofurudonosebof.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://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_df41f3d62b8f4a579849582c4ed7efe9.pdf?index=trueIn PDF document text
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_37cd0d2044c048ca9a653565829c4f1a.pdf?index=trueIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_dfe56c8604aa4575a386a7d7b016e0ae.pdf?index=trueIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_e6d4597b08a049afb95463b43c339fca.pdf?index=trueIn PDF document text
    • https://e8677ced-6330-435e-8237-200fb10408a4.filesusr.com/ugd/a4c1fa_cb3c57ee19b24166be40d3673f56ad14.pdf?index=trueIn PDF document text
    • https://748e62c5-a849-4dff-87e7-3b5f74cb3522.filesusr.com/ugd/0df896_fff377b2fd48416f9105ea2ea24cfe0a.pdf?index=trueIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_bb11caa84c7e4f84bf208649a4bf0771.pdf?index=trueIn PDF document text
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_7dc49fdba2c3490eac7713344e5d8787.pdf?index=trueIn PDF document text
    • https://5be7aec3-7d66-433b-ae1d-2bfb807ddf2a.filesusr.com/ugd/24deb6_31b1bffe72594c41b59d79697b255a9f.pdf?index=trueIn PDF document text
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_fa31e90ed33942f0a67a9284b52d048a.pdf?index=trueIn PDF document text
    • https://7ef7ebf0-bcb0-4ca2-8538-5a19c3e9f01c.filesusr.com/ugd/aff7ca_2bc8f5fff9cf43c593e94c6e63c8b055.pdf?index=trueIn PDF document text
    • https://4fdc5cb1-0646-4ed0-9ac1-f9332ff2c333.filesusr.com/ugd/9b9480_2407db0f67a046aba667b56c4943e79b.pdf?index=trueIn 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_off0000f079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF079 5372 bytes
SHA-256: d0d1285d4667891d701bd1404abfe00d2c17cd2126362a5beb829efa2d7019dd
font_01_sfnt_off00010299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10299 10312 bytes
SHA-256: 0e22fe302889cf1c361198a2680817a621eb5423c1a057f097c45d9f0cabed89
font_02_sfnt_off000125f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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