Malicious PDF — malware analysis report

Static analysis result for SHA-256 649f27032bfc1ca2…

MALICIOUS

PDF

72.7 KB Created: 2021-02-21 17:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b61599eccaca7b5f45ea96f385112173 SHA-1: efaf8a6d004cdc903c79ca09db1272764401f91b SHA-256: 649f27032bfc1ca29ea3ae352bd010811abb7e086d17d074a64ef12f2b266cb3
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/wix?keyword=chicken+genetics+gizmo+answer+key+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_5fe9f62892d72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_600a9fcad199c.pdfIn PDF document text
    • https://cdn.sqhk.co/wubofuse/ecBidjg/zojuzezipo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415739/normal_6019ab3637837.pdfIn PDF document text
    • http://tibetterrier.ru/beginners_guide_to_wordpress_seo4ov51.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/iiegdhf/football_referee_clothing_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/2aBfcCC/art_therapy_certification_nj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481684/normal_600dd2d58c895.pdfIn PDF document text
    • https://cdn.sqhk.co/fekurisakez/C4ggBii/lalokem.pdfIn PDF document text
    • https://sorawujij.weebly.com/uploads/1/3/4/6/134671526/kefepen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423453/normal_600c79415b43c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481675/normal_5fc9ea445b755.pdfIn PDF document text
    • https://nosodelutota.weebly.com/uploads/1/3/1/8/131857544/a865657b45.pdfIn PDF document text
    • https://tebukebodo.weebly.com/uploads/1/3/1/3/131381901/b5671f4fb.pdfIn PDF document text
    • https://vumopofusub.weebly.com/uploads/1/3/0/8/130874587/77655.pdfIn PDF document text
    • http://ketousa.site/gout_guidelines_australiafdbbp.pdfIn PDF document text
    • http://registrat.space/how_to_set_date_on_timex_easy_reader_watch4yq0n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://badisaxutut.rf.gd/motorola_moto_one_android_one.pdfIn PDF document text
    • http://noxikemudenuma.epizy.com/analytical_mechanics_hand.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_off0000de54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE54 5748 bytes
SHA-256: a1582611628e7e48b84cc7e0fe8a38554febfe66e316ef243f37cedb52274523
font_01_sfnt_off0000f1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E5 10368 bytes
SHA-256: 94a99e4725fa41148e0e9dc626bbf588a73151aeef3bfc015100e166aeca076d