Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f0e96413158a30…

MALICIOUS

PDF

74.7 KB Created: 2021-03-19 10:02:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5983b47054afd8d999ea4b51b900fcd0 SHA-1: 5c6a88ee28940cf2c3677097f506a08848a6e7d9 SHA-256: b1f0e96413158a3032e66af56297cfe6d65157ba2906f6143d4a5346d30e8af4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to direct users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the link farm heuristic suggest the document's primary purpose is to redirect users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jottigo.ru/aws?utm_term=bissell+pet+vacuum+roller+not+spinning
    • http://peuly.xyz/2002_mercruiser_5.0_mpi_specssifdy.pdf
    • https://cdn.sqhk.co/xogatijixe/T1hcgec/jatakerala.pdf
    • http://groby-ritual.online/9859654231wfbl8.pdf
    • https://cdn.sqhk.co/diridenafa/ijgfGjf/33592128856.pdf
    • https://folozulo.weebly.com/uploads/1/3/5/3/135351090/4af1004cb.pdf
    • https://cdn.sqhk.co/lerutefo/j6giOhg/97637666962.pdf
    • https://cdn.sqhk.co/faroziwe/frDgdQA/26229986470.pdf
    • https://wesuzekubiw.weebly.com/uploads/1/3/1/6/131607103/loduj_padusujikefore_vetuf_nokomeposiron.pdf
    • http://itclick.pro/gimoxeminukitu0hsy9.pdf
    • https://kazilapematif.weebly.com/uploads/1/3/5/2/135293457/6180502.pdf
    • https://cdn.sqhk.co/badaxiloru/vgijeMM/saint_pepsi_private_caller_mp3_download.pdf
    • https://zokelafeg.weebly.com/uploads/1/3/4/8/134889419/caaee783937b.pdf
    • https://cdn.sqhk.co/jisofoxabap/geZ6Ygh/rivokukunotidiwaxebedu.pdf
    • https://cdn-cms.f-static.net/uploads/4413375/normal_603c2238a2723.pdf
    • https://cdn.sqhk.co/popuzanuguw/NG7jedU/13088683050.pdf
    • http://tryadasert.online/ted_danson_young_cheers14ikr.pdf
    • http://complect-tech.ru/nebosh_igc_syllabus_20206zoc8.pdf
    • https://cdn.sqhk.co/fikalibumi/hf7XHgf/muzusoja.pdf
    • https://cdn.sqhk.co/roretuduva/jRC4jjd/78563007436.pdf
    • https://cdn-cms.f-static.net/uploads/4475741/normal_60205331c1bd4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_9c27d3be28ac43e1b12ffd701f041a92.pdf?index=true
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_8e49e71ba4ac4920b2aa681909e6ecf6.pdf?index=true
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_084a4c046a96465ea9fbf265f3d00035.pdf?index=true
    • https://64f3f273-fd79-4cea-bc15-92b2431614e2.filesusr.com/ugd/542254_ac26cc3af687472f8c712caf93328a5f.pdf?index=true
    • https://2c549fd3-bbcc-4e43-aea5-84609313cfd4.filesusr.com/ugd/c162b3_657d33d7cf2641f9a4bd4a24f57c9341.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e58b.bin
895a285f1439e39f21bc3e1d610db10dbcdf61d6fd15920c151868261d071c67
pdf-font-stream PDF embedded font (sfnt) at offset 0xE58B 5360 bytes
font_01_sfnt_off0000f7c0.bin
23dfb519c6d88aeb1905045b1ae3edae3f7858302397722845c1087075e2b87a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 10980 bytes