Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a1fc533527ee1f…

MALICIOUS

PDF

70.3 KB Created: 2020-11-12 21:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b1d7b6ce079fea2b7b2e17d7adc76e88 SHA-1: 551b3d1f3c4d4c3f45438c3decd35a2a6cd2e6eb SHA-256: d2a1fc533527ee1ffc0b3cf68b5ffdb3090749e65b39d11f9623f6e81e41c871
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=summer+jacket+mens+uk In PDF document text
    • https://litovabijoku.weebly.com/uploads/1/3/4/6/134666457/6000939.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_5f8a4e5486d22.pdfIn PDF document text
    • https://nufivinob.weebly.com/uploads/1/3/4/6/134682897/fejozikadiwiperuvim.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/safumadezi_dofusoxelakemo_rokiwamirep.pdfIn PDF document text
    • https://kozesetod.weebly.com/uploads/1/3/4/5/134507136/e315f46.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/salopuro-dawibibidir-rebofekoninufam.pdfIn PDF document text
    • https://xufidevudog.weebly.com/uploads/1/3/4/3/134389214/6106964.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/1696541.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mozedijiz/aspire_login_aai.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/the_old_man_and_the_sea.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/313ec52e-fa77-4ac6-b690-21e1bb4f5e52/veranapevewirosufuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c009d6b5-5c92-43d3-9810-b3828141e96a/18717739900.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/tagif.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC992 4880 bytes
SHA-256: a4cb195b1e459594b8056cd490c1068a51486ce1dc39529b3c335a270474c9d1
font_01_sfnt_off0000da09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA09 10656 bytes
SHA-256: 96ac29a3bad197ea86846477e65fadd1f08c63f2110faaccade0a37e620b1d34
font_02_sfnt_off0000fe33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE33 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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