Malicious PDF — malware analysis report

Static analysis result for SHA-256 573387ee46c291f5…

MALICIOUS

PDF

79.6 KB Created: 2021-03-25 15:49:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fcb04553eaa4a399f17d2fbd7f7fdd16 SHA-1: fd3d25d0f51f9fc38a1cf7bd1e5e5ff993b5b431 SHA-256: 573387ee46c291f5933af7c790a11560d5e339d7714a17214388650985d9aebd
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for SEO link farms and phishing lures, with one URL specifically mentioning 'eviction notice template'. Heuristics indicate a PDF link farm and ML classification strongly suggests maliciousness. While no scripts were directly extracted, the PDF structure and embedded links point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jumiwimov.ru/123?utm_term=eviction+notice+template+new+mexico PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418590/normal_6004d06276cd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459027/normal_60580051ba468.pdfIn PDF document text
    • http://getsol.xyz/collective_nouns_singular_or_plural_worksheets9rb89.pdfIn PDF document text
    • http://premiumpornclips.com/lavibidebusjpis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379491/normal_5fe59b5b74f0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375907/normal_6002206b168a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488566/normal_6021f9c1a1240.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418362/normal_5fea07471de17.pdfIn PDF document text
    • http://alex-chekalev.com/pamesofiweviruiichh.pdfIn PDF document text
    • http://agentsecure.space/pathfinder_kingmaker_rogue_buildqq7u1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478655/normal_60479faf288c1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b0cee159-9ce3-47d2-9452-de9e383f1b6b.filesusr.com/ugd/fac5c7_59bbfe35e13b481d9488362943fbb240.pdf?index=trueIn PDF document text
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_8c0aea9fb88242eba25b0edc1f9367c6.pdf?index=trueIn PDF document text
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_96e9363c0a904f4eb041d2a7a4ffcab2.pdf?index=trueIn PDF document text
    • https://722d0b64-886f-48d6-ad1d-3f240095bb95.filesusr.com/ugd/07f6b3_f1d9b4093a2245fe9c2f038561735f23.pdf?index=trueIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_7375bb553aa8464d8086b702ad45393c.pdf?index=trueIn PDF document text
    • https://46fb9a51-9e16-4ad8-811e-2f7ed01702f7.filesusr.com/ugd/53363c_e05ba9af96ac4e5992a654c784f9e7a5.pdf?index=trueIn PDF document text
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_12d5b7f4a4ab4493a678d02882f95de3.pdf?index=trueIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_c48b798140854c28943e836f411c5233.pdf?index=trueIn PDF document text
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_8bae9ef7178f45f296e61ff4b799a16a.pdf?index=trueIn PDF document text
    • https://6997f972-013f-4c6f-ac95-4179ba17a557.filesusr.com/ugd/549e1a_06d76c10ee3c46c3b622b28efd31d6af.pdf?index=trueIn PDF document text
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_6a157c590ead43fd88be1b70da952179.pdf?index=trueIn PDF document text
    • https://1e6856c5-1481-42a3-8d1a-2a2567f9fa5a.filesusr.com/ugd/a8b033_474b7f73999b4e0d943929600fb96ffa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF9 4984 bytes
SHA-256: 94af155d5ccd904936dab5c9a6c7eb1ea264bf16beac15401b7373846a2ebb8c
font_01_sfnt_off00010bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF8 10948 bytes
SHA-256: 7124097ae646b0758fafd11b92acb30213c8c208ba73736ddb7be4a0fda9ff2f