Malicious PDF — malware analysis report

Static analysis result for SHA-256 a771845b14bee0d6…

MALICIOUS

PDF

100.6 KB Created: 2021-04-08 09:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 230929b98eaaa16c9d7008a20884b004 SHA-1: ad436ea9fed5ff07e0bcf54249e906566942bb60 SHA-256: a771845b14bee0d6baa7ac2d44c366954285cd0e9aa7398c29764a3e75193084
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it is a malicious phishing lure, specifically mentioning payment redirection and callback scams. The embedded URL https://soxebez.ru/123?utm_term=airtel+broadband+connection+close+letter+format is a primary indicator of malicious intent. While no scripts were directly extracted, the PDF structure and ML classification strongly suggest it's designed to exploit vulnerabilities or trick users into navigating to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://soxebez.ru/123?utm_term=airtel+broadband+connection+close+letter+format PDF link annotation
    • http://kefijor.mygamesonline.org/athlean_x_max_size_reddit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426816/normal_5fed6413b162e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454672/normal_602da11274c72.pdfIn PDF document text
    • http://melidagerukebel.sportsontheweb.net/97352028796.pdfIn PDF document text
    • http://mujubow.getenjoyment.net/7467300431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386622/normal_604a67db5b3e3.pdfIn PDF document text
    • http://bumegafonuvitop.22web.org/85856727419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_604e69f580bf7.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/gupojakami/jadufupemedimaduw.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/32865290120.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/scientific_method_experiments_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/piano_adventures_christmas_3b.pdfIn PDF document text
    • https://e1406d7c-dd18-41ae-88d3-07b0dcc6d79c.filesusr.com/ugd/70c1f8_1ea066d48cad4927a17f83f65d331265.pdf?index=trueIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_66dbcc4865c74a699045cf5e02aa8097.pdf?index=trueIn PDF document text
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_3a9c34a8a2c04a9590ed23f5890c8a09.pdf?index=trueIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_3c92f9e4f7804081ba773569c84412cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/nephrotic_syndrome_guidelines_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/bennie_and_the_jets_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/aparajita_tumi_all_songs_free.pdfIn PDF document text
    • http://lulawutereb.rf.gd/zofefiwosufidux.pdfIn PDF document text
    • http://zajupulavofawi.myartsonline.com/tamil_to_english_spoken_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/tabevukaxadegapolojuliw.pdfIn PDF document text
    • http://ligiwekuxote.myartsonline.com/livro_acupuntura_auricular.pdfIn PDF document text
    • http://didewuwu.epizy.com/machine_learning_modelling_in_r_cheat_sheet.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_off00014679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14679 5296 bytes
SHA-256: 5fdc188f2deb6736397ec966bcebbe61859af801e579c21654f81f96e24234c1
font_01_sfnt_off00015860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15860 13684 bytes
SHA-256: 2cdc9d8018576ac388c5e1e85ccfae487bf2f490a3739ebde39f7c9d778a056c