Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d9063d9f8b847b…

MALICIOUS

PDF

62.7 KB Created: 2020-10-10 13:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7252552f3de560daeef0e9204366fafe SHA-1: d9fe989f195bec3c6f875229e9f7125f3523f771 SHA-256: b3d9063d9f8b847be5dbf1defd4db1e9ac3d501c15ee4c7c0ab075f090f01b9e
184 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a programming manual, which is likely a lure to encourage clicks. The presence of embedded URLs and the heuristic firings strongly indicate a phishing or redirection attempt, likely leading to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ggtraff.ru/strik?keyword=dsc+1555mx+programming+manual In PDF document text
    • https://site-1042729.mozfiles.com/files/1042729/jubavagulidaxiwejopelo.pdfIn PDF document text
    • https://site-1038702.mozfiles.com/files/1038702/dadozugujuzokelumajuvapik.pdfIn PDF document text
    • https://site-1037891.mozfiles.com/files/1037891/91198460388.pdfIn PDF document text
    • https://site-1039728.mozfiles.com/files/1039728/dulakamor.pdfIn PDF document text
    • https://site-1048265.mozfiles.com/files/1048265/levelux.pdfIn PDF document text
    • http://viren.windowwarehousedraperysupply.com/uploads/1/3/1/4/131437812/seretos.pdfIn PDF document text
    • http://files.milesindustriesnz.com/uploads/1/3/0/8/130874143/3387999.pdfIn PDF document text
    • http://files.notary4public.com/uploads/1/3/0/8/130873828/benatarebav.pdfIn PDF document text
    • http://files.zenwich.us/uploads/1/3/2/6/132681144/vutivifonugozu.pdfIn PDF document text
    • http://biraput.sealsriflescopes.com/uploads/1/3/0/9/130969352/a54a97.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000a8e8.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000a8e8.bin)
    • https://cdn.shopify.com/s/files/1/0428/7738/6911/files/jarisad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9622/3133/files/berea_midpark_high_school_mascot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0130/2168/files/44298171093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e06c59c0-10aa-4d67-b1cb-1fb35d6778ea/26573019598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa8225c3-b3d2-479f-b312-5ad5e1867061/33832917203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecde12c7-81c7-4932-aa94-94c1ece48e4a/69077548220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d287d53-0044-4ef3-8a8d-74931f03b7db/kejojetoboferad.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 extracted file (font_00_sfnt_off0000a8e8.bin)

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8E8 5496 bytes
SHA-256: 5be101dec99791328cceedc1a9449e5fd4740c4e627de09d130cc3d94e96738c
font_01_sfnt_off0000bb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB8E 16308 bytes
SHA-256: a7fb2afdaf50c6077290c4840defa2f43c5c7f3a6b3f9a1656e9171057157728

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