Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62a60f5d570bb74…

MALICIOUS

PDF

204.1 KB Created: 2021-02-11 20:17:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5929209b2b74c998a673c39eb2651b3e SHA-1: 141747ce31e94a95a00e7bf32dab2d611cc90eed SHA-256: b62a60f5d570bb749d862be3b9b46f58112d8593fdec64155c2763b271e77689
116 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, where the document prompts the user to call a phone number. While no scripts were extracted, the presence of embedded URLs and the nature of the heuristics point towards a social engineering attack designed to trick the user into initiating contact with the attacker.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://druttle.ru/123?utm_term=discovering+our+past+a+history+of+the+united+states+early+years+online+textbook+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408184/normal_5fc8728ce59d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421937/normal_5fe4e45b73c2a.pdfIn PDF document text
    • http://tonalemeketav.66ghz.com/letter_a-_z_tracing_worksheet.pdfIn PDF document text
    • https://zipuwuxa.weebly.com/uploads/1/3/4/3/134376087/f3bbdd.pdfIn PDF document text
    • https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/gezom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409257/normal_6017b57ad0ed6.pdfIn PDF document text
    • https://danaguvofuboxi.weebly.com/uploads/1/3/5/4/135401293/3a2515f6777d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413564/normal_5ff3cc8b17876.pdfIn PDF document text
    • https://silavetej.weebly.com/uploads/1/3/5/3/135314504/nodukifup_kowukisilonoza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/82484082724.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/68411654750.pdfIn PDF document text
    • http://poradenojipedu.rf.gd/formal_email_format_o_level.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/14058568104.pdfIn PDF document text
    • http://bopamebedozupux.epizy.com/cell_cycle_checkpoints_worksheet.pdfIn PDF document text
    • http://boxokur.epizy.com/adanga_maru_movie_songs_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002c475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C475 5848 bytes
SHA-256: a52b127a02df28cc8629a6ef1c14f0779d00f414d95c5d51b5e1e462d090a54b
font_01_sfnt_off0002d870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D870 16656 bytes
SHA-256: 8566bfe373e86a335e437c7e3fdd4a1ceb2a0ccbcc5e9f942a13676cefaf564b
font_02_sfnt_off00030a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A4A 16068 bytes
SHA-256: b09879be15c6eb2246ae7b48c1c275502bdacda3194b2e7a150da035b49823e9

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