Malicious PDF — malware analysis report

Static analysis result for SHA-256 063cb680ca97a061…

MALICIOUS

PDF

79.3 KB Created: 2021-06-04 04:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb35d1c6a18907092b7a4b60f49d8bf4 SHA-1: c4b5af85ecc45a364c9413b03d15a3b2a830adae SHA-256: 063cb680ca97a06118b066ed4ccead151a048acdf7013fb01bb8b9f1255730b4
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The heuristic PDF_SEO_LINK_FARM indicates the presence of a large number of external links, with one pointing to https://midufefew.ru/123. This suggests the document is designed to redirect users to potentially malicious websites, possibly for phishing or to host further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://midufefew.ru/123?utm_term=chitrangada+singh+movie
    • https://static.s123-cdn-static.com/uploads/4501794/normal_5fcbbe65b09d6.pdf
    • https://cdn-cms.f-static.net/uploads/4458161/normal_6052c5ce3c442.pdf
    • https://cdn-cms.f-static.net/uploads/4420776/normal_605c7089581b0.pdf
    • https://static.s123-cdn-static.com/uploads/4408195/normal_6008022e00a29.pdf
    • https://static.s123-cdn-static.com/uploads/4366377/normal_5fedcffa270e6.pdf
    • https://cdn-cms.f-static.net/uploads/4457592/normal_60b8a918ef362.pdf
    • https://cdn-cms.f-static.net/uploads/4407781/normal_602d4fe5d2ce2.pdf
    • https://cdn-cms.f-static.net/uploads/4392207/normal_604875df75143.pdf
    • https://jesilezozuzi.weebly.com/uploads/1/3/4/7/134745232/254696b87e.pdf
    • https://cdn-cms.f-static.net/uploads/4496582/normal_5fe81b1b3a730.pdf
    • https://gogijufiwadika.weebly.com/uploads/1/3/4/5/134581681/00826fb27c1765.pdf
    • https://nekemefewebewon.weebly.com/uploads/1/3/7/5/137504470/7917023.pdf
    • https://cdn-cms.f-static.net/uploads/4484359/normal_6060b8480ac1e.pdf
    • https://static.s123-cdn-static.com/uploads/4403276/normal_5fffd53a2b8ea.pdf
    • https://static.s123-cdn-static.com/uploads/4425214/normal_5ff414c2103c7.pdf
    • https://cdn-cms.f-static.net/uploads/4451374/normal_603b6a3c88c92.pdf
    • https://cdn-cms.f-static.net/uploads/4382418/normal_603a886204425.pdf
    • https://static.s123-cdn-static.com/uploads/4486983/normal_5fff513aa796b.pdf
    • https://cdn-cms.f-static.net/uploads/4468563/normal_5fdb9f03043db.pdf
    • https://cdn-cms.f-static.net/uploads/4478398/normal_605536384f6cd.pdf
    • https://cdn-cms.f-static.net/uploads/4467571/normal_60378f2884b1b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pibadaro.pbworks.com/f/3686399953.pdf
    • http://negovijalulu.pbworks.com/f/xoruxoxadekanujilugofoju.pdf
    • http://kunozulig.pbworks.com/w/file/fetch/144545970/bekuse.pdf
    • http://jitilabajeko.pbworks.com/f/123_free_movies_app_for_android.pdf
    • http://kufogokoges.pbworks.com/f/rotations_about_the_origin_worksheet.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_off0000fa4d.bin
62c1af104f4bb57e7c0bd4351449e2cd1e06de45e813ad62e7df8380ef91ab12
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4D 5172 bytes
font_01_sfnt_off00010bb8.bin
acc0849428725d48a471b3bee536b83dde04cbb1abd2239b47ed453030efcfdc
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB8 10428 bytes