Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69409bf2384d108…

MALICIOUS

PDF

75.7 KB Created: 2021-03-11 17:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b298c7dc7d1e82dffca5c40e56a185d2 SHA-1: e638da9b05f6b9b1ac4fbf625f4e36033d43fe2d SHA-256: d69409bf2384d108f552d041e659eebc2d7fdc0d80385a807b1aa071da186815
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning or phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=mercedes+benz+sprinter+service+manual+pdf
    • http://hq-cleartv.info/howard_miller_grandfather_clock_replacement_weightsobs6f.pdf
    • https://xutifapob.weebly.com/uploads/1/3/2/7/132712150/2724373.pdf
    • http://eeeeeyyy.space/what_color_should_blood_be_after_giving_birthkryuz.pdf
    • https://wolegowagu.weebly.com/uploads/1/3/4/4/134404953/fanefonewokajilume.pdf
    • https://cdn.sqhk.co/wibetaxor/kii8jcT/tevituxufufisulowite.pdf
    • https://fubuwadedaxas.weebly.com/uploads/1/3/4/8/134897716/gesumadewubofar-boligimef.pdf
    • http://anarchymedya.com/soccer_goalkeeper_weight_training_routinezf0c9.pdf
    • https://cdn.sqhk.co/lekibefefu/6jbO566/gekatajimubof.pdf
    • https://silolezozuwagu.weebly.com/uploads/1/3/0/7/130774999/pejebupuxuxog.pdf
    • http://se-mrush.com/2816001439345ian.pdf
    • http://lapuxuzogu.22web.org/pitegipopowax.pdf
    • https://nasaperexi.weebly.com/uploads/1/3/5/3/135351481/watatole.pdf
    • http://galoomer.online/28003381418secv8.pdf
    • https://cdn.sqhk.co/tebefaravuz/hhOghcO/vomiting_causes_metabolic_acidosis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://lekinip.epizy.com/68471061316.pdf
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_fe2398067b704f599d2bd2449cdecc9a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/eb4531dd-e9f2-4ec6-8ea1-9bd2b8a0b0cf/star_constellations_tonight_uk.pdf
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_836d709a628b423b96906549c51c7324.pdf?index=true
    • https://cf62593c-3f62-494e-9ef9-3c2a63ead7d7.filesusr.com/ugd/93dae2_deaa00ee157a44a8a59d7a96c70d46ec.pdf?index=true
    • https://uploads.strikinglycdn.com/files/aa9c2a05-3047-4cfc-862d-8bcb5ae0148f/wejudugaz.pdf
    • http://fewabawunidud.epizy.com/wepibabaj.pdf
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_53a38991935e4c1d8838239e9bd9967f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c7228f79-5619-478e-b1db-bd668807721d/50948867282.pdf
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_5d964c73ae1c4171a41b91906328bc3b.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db81.bin
0cdfe51a19d7df77bcf6a50925b2a96831cbdcc0a6215896e1161f3523b0bb85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB81 5328 bytes
font_01_sfnt_off0000ed92.bin
5e8c7f01a110180f77f4000b7845e3ce1a43529d0d6ef3095eb24baf68042810		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED92 10804 bytes
font_02_sfnt_off00011246.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11246 4324 bytes

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