Malicious PDF — malware analysis report

Static analysis result for SHA-256 47899411fb0f258b…

MALICIOUS

PDF

75.6 KB Created: 2021-06-13 06:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2d037a8b2870fc5cced82a659e9c2699 SHA-1: 0bf38f5c08f71d97e5ddc4fc906863250f7b9d73 SHA-256: 47899411fb0f258b99410228649852953b9ef29f443ab6a7a2249c066dd16b99
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, indicating a phishing or SEO spam campaign. It contains a large number of external links, many pointing to disposable hosting services, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. No scripts were extracted from this sample, but the presence of numerous external URLs is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://archism.ru/pbw?utm_term=nba+2k18+apk+offline PDF link annotation
    • https://nadaxobolimige.weebly.com/uploads/1/3/4/3/134365666/daronubolalopoliz.pdfIn PDF document text
    • https://riwinuwozobama.weebly.com/uploads/1/3/4/8/134868589/kofag-rukaxisan-difivup.pdfIn PDF document text
    • https://likuwiwekadu.weebly.com/uploads/1/3/1/8/131857000/e1cfc09.pdfIn PDF document text
    • https://xumexutibivuw.weebly.com/uploads/1/3/2/6/132680998/6361486.pdfIn PDF document text
    • https://janaravepok.weebly.com/uploads/1/3/4/8/134886337/meradiv-sexusofabu-zixukinati-fexasixetikok.pdfIn PDF document text
    • https://sudikejejipow.weebly.com/uploads/1/3/4/8/134879182/kenileso.pdfIn PDF document text
    • https://vonekinorosasox.weebly.com/uploads/1/3/4/7/134732286/18dc3424b85c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://runaliguredu.pbworks.com/f/best_lenses_for_mamiya_rz.pdfIn PDF document text
    • http://jutifakukap.pbworks.com/w/file/fetch/144830724/xuwosivutipiw.pdfIn PDF document text
    • http://detomipipu.pbworks.com/f/need_for_speed_underground_2_on_steam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30c56846-04b8-41e5-8425-7bb48f7b2d66/one_touch_ultra_test_strips_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/218cf90b-426f-4dc4-8f6e-36f6d4fbe1f1/98081783646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba8b6e83-4945-4191-9ff6-81c73957a567/70182607062.pdfIn PDF document text
    • http://mujiwareneje.pbworks.com/f/sapafototafokogumixi.pdfIn PDF document text
    • http://fuvoguzufopi.pbworks.com/w/file/fetch/145228722/cosmos_season_1_episode_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e59e0124-901a-4590-bd51-b0b546060008/download_juz_amma_latin.pdfIn PDF document text
    • http://busututesemo.pbworks.com/w/file/fetch/144761394/why_is_my_pen_blinking_red.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72c0848-9307-46b0-b49e-c2567718f0d4/vukigafebiwukudabav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/091ed577-b900-431e-88d8-92aaf3219e7d/dokinizud.pdfIn PDF document text
    • http://kutegazez.pbworks.com/f/pazeboxemozelopetelofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e058312-14fd-4d40-b8f3-f61436ee0360/bulaxobuked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44d66981-efbd-4c07-8627-65154995ba26/cen-tech_digital_multimeter_95652_manual.pdfIn PDF document text
    • http://nagomax.pbworks.com/w/file/fetch/144601083/93889434263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80169b6e-8156-4bf9-9934-c93f797418c9/armenian_alphabet_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ced8b46a-2a42-4c07-a62a-cc33c5b91449/vetevigixasomefulab.pdfIn PDF document text
    • http://mupalunava.pbworks.com/f/38430456152.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_off0000ea5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5D 5172 bytes
SHA-256: 54a0a83d5a972969d7a44459849722987ced69e1993de3145012e98c9120e2b2
font_01_sfnt_off0000fc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1C 10804 bytes
SHA-256: 283fa4387f1a9dd32a6b133419ff0acc71b8d3dc65d116a3d15a705b86c6409d