Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9dc3adebfc84d9…

MALICIOUS

PDF

87.6 KB Created: 2021-04-01 16:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d8e51e64d9e532e855b8206e559a8f9 SHA-1: d900082bbd8ff4af7472a54da8c6aa98d3e4c225 SHA-256: 5b9dc3adebfc84d936252ae1f190acd1273e720d07c86e1b4cdfa50ba2994f82
156 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, as indicated by the 'PDF_SEO_LINK_FARM' heuristic and the embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent. The file likely attempts to redirect users to malicious content or download further payloads, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/award?keyword=third+party+logistics+definition+pdf
    • https://cdn.sqhk.co/fogibadeku/hehckVh/35654265824.pdf
    • https://cdn.sqhk.co/seworani/dia1ghB/naxipepuduturamudabafipe.pdf
    • https://cdn.sqhk.co/muxuzoxipopa/e9VYMia/sceptre_65_tv_manual.pdf
    • http://nenavukatebofaf.22web.org/list_of_bc1_caste_in_bihar.pdf
    • http://tiwikif.22web.org/40929374476.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/davolazupivowi/google_data_studio_conditional_formatting.pdf
    • https://uploads.strikinglycdn.com/files/13bf0950-19c0-4baf-a2ce-3291eccfa0b0/hp_6500_printer_cartridge_error_message.pdf
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_38012b904a524d94be77eeb90a54d830.pdf?index=true
    • https://s3.amazonaws.com/feliso/systme_des_castes.pdf
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_d51c4f62a13b48008864709c9bf0f194.pdf?index=true
    • https://18d8f76e-0bdd-4b96-b744-fee987eed1b0.filesusr.com/ugd/1486c8_2e87de37627a4db98161a884e2e0b00e.pdf?index=true
    • https://s3.amazonaws.com/gajabedafot/29269671862.pdf
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_8b0a0057cafb45818c94f8387e915d2f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/24f99164-2390-4f36-a149-0e3ace77bc1c/streams_in_the_desert_devotional_archives.pdf
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_bf0e91c255354af299b21dce2af189aa.pdf?index=true
    • https://s3.amazonaws.com/ruzumeb/comdial_dx_120_user_guide.pdf
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_25513e78cee3430eb9372bb8dbd3f65c.pdf?index=true
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_af7e407552984ae3a7c3462851c11abc.pdf?index=true
    • https://s3.amazonaws.com/xapota/banner_guide_a_kyocera.pdf
    • http://pizubape.rf.gd/piropexete.pdf
    • https://4c8cc264-4606-483b-a6fd-3ab48ba5c15a.filesusr.com/ugd/c626f4_c90426415a424301b65a33e56c0a68bb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e82d2d34-8962-4125-a5fa-67a0d0be39df/what_are_the_duties_of_a_medical_lab_technician.pdf
    • https://uploads.strikinglycdn.com/files/3208febb-6213-4f3d-8040-11f495ebf8fe/52225298920.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001166b.bin
f4f15e94e0bd8a7f8dbfb0465f2cdac1e6d84daff788285291dd28a2f416fd79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1166B 5468 bytes
font_01_sfnt_off0001290a.bin
1a6eafff1370e9e823e435817875655398f30e8ebc3c1391ee09a2dfc9b6fb74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1290A 11716 bytes

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