Malicious PDF — malware analysis report

Static analysis result for SHA-256 9594cecba8571533…

MALICIOUS

PDF

82.8 KB Created: 2021-05-10 04:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a2b9d9b0d469d63cb2060a0f0797739c SHA-1: e4474b68d81fcb7bdd61af88910a01a6df6a58b6 SHA-256: 9594cecba857153357cfc87f89019bd3ed499648c2d05e5b27975098e57295f7
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, indicating it functions as a link farm. One prominent URL, https://maypoin.ru/strik?utm_term=wendy%2527s+bacon+pub+fries+nutrition+facts, suggests a potential lure related to search terms, possibly leading to phishing or malware distribution. The PDF structure itself does not contain executable scripts, but the extensive link farm points to an external malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://maypoin.ru/strik?utm_term=wendy%2527s+bacon+pub+fries+nutrition+facts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449774/normal_5fc72d90c45ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475572/normal_605ad317e68ad.pdfIn PDF document text
    • https://devigejijakefu.weebly.com/uploads/1/3/2/7/132740662/8361391f.pdfIn PDF document text
    • https://totamozosapopa.weebly.com/uploads/1/3/4/7/134712517/6814774.pdfIn PDF document text
    • http://savupubib.22web.org/sword_of_summer_weebly.pdfIn PDF document text
    • https://xujopikaxatanow.weebly.com/uploads/1/3/4/8/134850499/b9158b05c3.pdfIn PDF document text
    • https://tuzokoluxalof.weebly.com/uploads/1/3/1/3/131382257/dobedufulika.pdfIn PDF document text
    • https://xunopigiwigon.weebly.com/uploads/1/3/1/6/131636761/55ac075db561d99.pdfIn PDF document text
    • https://xidelora.weebly.com/uploads/1/3/5/2/135296398/rofili_rojemiti_xekasajukifokup_zomijofokali.pdfIn PDF document text
    • https://lixubirenolona.weebly.com/uploads/1/3/4/6/134669397/243914.pdfIn PDF document text
    • https://jekodijup.weebly.com/uploads/1/3/4/4/134490718/lopaz.pdfIn PDF document text
    • https://zesalogerevuj.weebly.com/uploads/1/3/4/6/134684883/1933606.pdfIn PDF document text
    • https://xevekefipozi.weebly.com/uploads/1/3/1/4/131406281/zaxofozipobex_lugelovi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401540/normal_5fcb21e63c798.pdfIn PDF document text
    • https://nuzozixajalupik.weebly.com/uploads/1/3/0/7/130739607/9512499.pdfIn PDF document text
    • https://gedijidejejew.weebly.com/uploads/1/3/0/7/130775336/4504981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376852/normal_60488689d420c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366340/normal_5fee401b77104.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f61c47-9756-4250-8798-df4c3965d9ee/80160212062.pdfIn PDF document text
    • http://ritofeli.epizy.com/online_schengen_visa_application_form_for_belgium.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d550742e-6c21-4af8-9c6c-537adac0de57/how_to_make_mosquito_bat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b83a6ca-a10a-4031-9af7-71aad8903008/65982913811.pdfIn PDF document text
    • http://gedamodeges.epizy.com/blanche_bailly_ndolo_audio.pdfIn PDF document text
    • http://zotijoxamofos.epizy.com/draw_sheet_for_16_players.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea3458c-93e6-43e4-8555-c78d7cc0a5e9/nordictrack_rw200_weight_limit.pdfIn PDF document text
    • http://towirasoruxapob.rf.gd/pitukoxukami.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 PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10266 5408 bytes
SHA-256: bc3549f838353cb28515a2cae67a66c0588c91139e69755a52c154c6b75728d9
font_01_sfnt_off000114f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F1 11848 bytes
SHA-256: 8fd4e4e3068e7a2c671c257a924e5766a05878b515df9ce2ec68405433333a32

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