Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f2547b0da23b3c…

MALICIOUS

PDF

80.9 KB Created: 2021-03-08 22:46:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6341b6bb50a79897b4f7b263e651f80c SHA-1: c7259d06da231ad1eb25e6077485ced35fdc211d SHA-256: 44f2547b0da23b3c572c6ef775168945d6ee400007902f021021e5354ed01ea1
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, with one example being https://zaderoxuk.weebly.com/uploads/1/3/4/6/134694825/a8a12e.pdf. This suggests the document's primary purpose is to redirect users to potentially malicious websites, likely for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://fokemale.ru/award?keyword=urobilinogen+adalah+pdf PDF link annotation
    • https://zaderoxuk.weebly.com/uploads/1/3/4/6/134694825/a8a12e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_601c88d79ed17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447460/normal_6008dfab4917e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416928/normal_5ffb778fa71d3.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/0gDhjyp/download_zarchiver_mod_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/kidurukazag/jchfhfF/rigevogir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494433/normal_5fc739e585353.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454306/normal_5ff152a035fbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382201/normal_5fd0968dd974e.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/i1ibv8b/65498096247.pdfIn PDF document text
    • https://goluluvofa.weebly.com/uploads/1/3/2/7/132712214/lazasibetew_benake_wumikak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366015/normal_5fe1a58f3826f.pdfIn PDF document text
    • https://sovipepunufo.weebly.com/uploads/1/3/5/4/135400675/nevisewatuxifud-bepubut.pdfIn PDF document text
    • https://cdn.sqhk.co/jopuromug/jIS4sjB/telupiketivipewesumaleva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393188/normal_5fffd24c32892.pdfIn PDF document text
    • https://kagivosivozavex.weebly.com/uploads/1/3/4/7/134746508/wuzavesadifekig_duvigor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_601617836b2cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419654/normal_5ff96d88cab94.pdfIn PDF document text
    • https://pegufalijedosok.weebly.com/uploads/1/3/4/5/134589263/74df6bcffcb37.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/cf3775f9-73b3-4bd3-a66e-950edfa1e283/2006_nissan_altima_owners_manual_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/oracle_academy_answers_midterm_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9818dc2a-0767-4bb1-b931-764b67d4eebb/how_to_contact_starbucks_rewards.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/luwimofimimujidexezuwuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e04679-fd33-4179-9b0d-9dcb1f14e439/line_6_spider_v_30_mkii_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/95378681792.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_off0001005b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005B 5256 bytes
SHA-256: 53e6ef9fdf2375d40957cfceda677dd90c5071689176657a974e82f3dc0f93e3
font_01_sfnt_off00011231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11231 10596 bytes
SHA-256: 252906048c66fad3359ad86fecdbcf44b8b0592cceb8658cd72f60d372a7bf30

Open this report in the interactive analyzer, or submit your own file for analysis.