Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3a7558e1672867…

MALICIOUS

PDF

64.0 KB Created: 2021-01-17 15:04:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d0676d86406529d89883327e094a96c0 SHA-1: 87d1db218e89c5336011f59b65e2a64c38064322 SHA-256: 2a3a7558e16728678750e1f7b592286c780ec48aae2b45f9f0ed9f88b36f02a3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics indicate the presence of external URIs and a visual download button, suggesting a lure to download further content. The callback lure heuristic further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/aws?utm_term=2d+cad+models PDF link annotation
    • https://site-1168018.mozfiles.com/files/1168018/find_my_friends_iphone_app_apk.pdfIn PDF document text
    • http://bobejitamatu.iblogger.org/acrobat_xi_std.pdfIn PDF document text
    • http://sukujemegamog.22web.org/landlord_bond_refund_form.pdfIn PDF document text
    • https://site-1166739.mozfiles.com/files/1166739/ariesms_guide_training.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/fEWgfgc/kazatunepipimo.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/LicLFia/battle_angel_alita_last_order_volume_8.pdfIn PDF document text
    • https://site-1166674.mozfiles.com/files/1166674/honeywell_t6_pro_manual.pdfIn PDF document text
    • https://site-1244863.mozfiles.com/files/1244863/junutuxaf.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/aFggKih/12557479599.pdfIn PDF document text
    • https://cdn.sqhk.co/dizirajeb/igG2hi8/washington_hockey_coach.pdfIn PDF document text
    • https://cdn.sqhk.co/tuponapalab/DgegfHC/tosotidelor.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/sowewazulejewi/94830651450.pdfIn PDF document text
    • http://kedogevakubonog.epizy.com/86586502210.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/55091856959.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/civil_code_1954c.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/43027876527.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/bradycardia_acls_algorithm.pdfIn PDF document text
    • http://zepedijuva.epizy.com/shabadimath_kannada_calendar_august_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/60362135947.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/gupumotivubiwomolu.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_off0000bba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA6 5028 bytes
SHA-256: b91d191a3a6f60762626008b43f33ece0f53cb16cd085b0c704a703c6651fc97
font_01_sfnt_off0000cca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA5 11372 bytes
SHA-256: c18e25801d7d3c8881cfc8cfa2573a2a7bff67a0113f978a8ce20de7793dad99

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