Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebfdaabbdcfc42b0…

MALICIOUS

PDF

95.3 KB Created: 2021-03-30 14:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7746931279125d2a666033b523c13a60 SHA-1: 55a54fbeaeb11dd1aa3c8c542f3359141a5fc98f SHA-256: ebfdaabbdcfc42b0a4819fa547a49cdf6de0ee014dc86ec5734c1838793a70cb
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a large number of external links, many pointing to disposable domains, characteristic of a link farm. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true purpose, which is likely to lure users to malicious sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://baarspo.ru/award?keyword=cantico+delle+creature+originale+pdf PDF link annotation
    • http://spoonnumberone.xyz/dadobofurumupavuxe6pk3u.pdfIn PDF document text
    • https://gulegeletemewux.weebly.com/uploads/1/3/0/7/130738758/vepuzi.pdfIn PDF document text
    • http://creditactive.info/davixodojujibumi5sfn5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383334/normal_6018e1059c4cd.pdfIn PDF document text
    • https://puvukiroleta.weebly.com/uploads/1/3/1/4/131455247/zifatu_bifupu_maxazesogom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477379/normal_601ef2e6c0a43.pdfIn PDF document text
    • http://damvglaz2.xyz/53039222970l9f4w.pdfIn PDF document text
    • http://malespw.xyz/5m_bell_tent_footprint_groundsheetmobvx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_605c158e9202f.pdfIn PDF document text
    • https://wowevabesal.weebly.com/uploads/1/3/5/3/135322278/putobeguguvolutafe.pdfIn PDF document text
    • http://vashobereg.com/fedex_customer_support_email_address0q91x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_5fdaf08e6d293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498997/normal_604d07a8e9fbf.pdfIn PDF document text
    • https://bijimuxe.weebly.com/uploads/1/3/4/8/134886115/timar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_47d2d62445f84fdfaed7117b0a5e417d.pdf?index=trueIn PDF document text
    • https://f3874c2d-c116-49c2-b7b6-9300dc8fc43e.filesusr.com/ugd/b11f6d_6f113e0e141a4e77a5b42cc3d0e811cd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3de1d7ff-1006-4b3b-a83f-ab1fd38073c6/kenmore_elite_dishwasher_665.127_parts.pdfIn PDF document text
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_d6d692f5b6cf484185f433b66da82f14.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d206a20a-18a4-4666-b346-1a0b06719493/how_to_politely_decline_mlm_offer.pdfIn PDF document text
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_0d08495578e84489ac5a8110bed55470.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fad5643a-7cea-4abf-80b6-5417245a8369/how_to_write_a_paragraph_proof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c65be519-bc47-469e-a1f2-7da82e6a9f0c/49834116281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1210779a-5bb2-41aa-9a4e-3eb8c648f5a5/24400954811.pdfIn PDF document text
    • https://0bdb67af-4c57-4a6e-9706-714cc80719f5.filesusr.com/ugd/fc840b_4aa27e08c07f40ac93b575cfe1ac59b5.pdf?index=trueIn PDF document text
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_a1630d682aed464bb42601e40ef8aecd.pdf?index=trueIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_e8ed5156920e4df1a91e7fb1ac35d007.pdf?index=trueIn PDF document text
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_dcadf5b7867846dc8b2b5413b3989784.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_off0001341a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341A 5048 bytes
SHA-256: 789aff27dc5ce4f2414c2d66ee08144656680b56853b41cc94900769959cfb81
font_01_sfnt_off00014553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14553 12756 bytes
SHA-256: 2d33fb2acbe33885dfc6a1845ab582a08ef2214682cfb8f0960e384b0eeee787

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