Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c907d762a8edcc6…

MALICIOUS

PDF

72.2 KB Created: 2021-03-20 11:32:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a78d5ace37d359c88ba0c911aab710d4 SHA-1: 2e707db2a84764e5d43749d6e14b83443424d8dc SHA-256: 2c907d762a8edcc684d5d736f20f3e1acbb62c4d62300ccbeec5789f9ab01078
176 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://golowaki.ru/123?utm_term=princeton+reverb+68+manual PDF link annotation
    • http://copyright-securityx.com/bounce_game_for_jio_phonewq7xs.pdfIn PDF document text
    • http://ijmalan.xyz/100_ways_to_avoid_using_the_word_veryigb96.pdfIn PDF document text
    • http://naturfresh.fun/60723896772c76h9.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/hMiipLT/my_3_top_up_online_ireland.pdfIn PDF document text
    • https://cdn.sqhk.co/wasuxuletiz/nVCEfie/66031529496.pdfIn PDF document text
    • http://xteenware.online/patalibujurufufininujvf8h.pdfIn PDF document text
    • http://peludofnor.fun/26340117364jtwyj.pdfIn PDF document text
    • http://natur-bio.space/3030709981v7oq4.pdfIn PDF document text
    • https://cdn.sqhk.co/dujuxafetot/V4ggXTO/mi_at_t_apk_2019.pdfIn PDF document text
    • http://copyright-services-us.com/volugofujubaworowoniwib97i74.pdfIn PDF document text
    • http://vvinorama.website/area_perimeter_and_volume_worksheets_ks3y9um7.pdfIn PDF document text
    • http://jobauthor.online/rawokifejarabawaweleterjsuz.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/musoxifuvitalo/guitar_songbook_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/wh_questions_answerable_by_yes_or_no.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/how_do_i_find_my_technicolor_router_password.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/rowenta_focus_excel_steam_iron_manual.pdfIn PDF document text
    • https://4c6480a9-ccec-4c20-853c-cc48681c44ad.filesusr.com/ugd/935adc_bca5d38c1992468186795d76ec85c7d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/birazogaxup.pdfIn PDF document text
    • https://777dd155-384c-4f1d-a337-8f27b94bb056.filesusr.com/ugd/1ecdae_b7c9651db7a3490a952be67b76b5bbad.pdf?index=trueIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_067b8054de474975bc425c438891702a.pdf?index=trueIn 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_off0000daf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF9 5316 bytes
SHA-256: 193d49b0b1bc7fb22950e566af0820a1709a41986033d2a1657f788b2dfebfde
font_01_sfnt_off0000ecfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFB 11400 bytes
SHA-256: fa8aef058221464d347102b37930c9e08d88851403e204234219c032d18b3e2f

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