Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaebe0445afb32fa…

MALICIOUS

PDF

87.1 KB Created: 2021-09-21 11:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f4b09b8abe00d4d85893d2d1efd70842 SHA-1: 6077aa88ad163dc67070217e524cd9da814a15a8 SHA-256: eaebe0445afb32fa03b8ae21e42d600268d8b489163a5e1e570615f54499abb9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, suggesting a link farm designed to distribute malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in phishing and tech-support scams. While no scripts were directly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the distribution of further payloads or phishing attempts via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://oniceh.ru/uplcv?utm_term=iphone+message+not+delivered+to+android
    • http://eperon-kochersberg.com/img_db/varemipiberizexobaxemalu.pdf
    • http://rana-international.com/userfiles/files/javerilafoxedujivunavar.pdf
    • https://barcelonacentremedic.cat/files/galeria/files/xokoku.pdf
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/32042129949.pdf
    • https://cambodiaangkorhomestay.com/userfiles/file/lutog.pdf
    • https://ochronaskory.pl/pliki_user/File/81732892208.pdf
    • https://rumahbaruku.com/contents/files/razudurenamegaki.pdf
    • http://omonetach.pl/foto/ilustracje/file/54334856565.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/7c44715af4ee28c9c6911bdd473f8221/gogejisejalonademexuvujan.pdf
    • http://aallergy.friend-match.com/upload/files/kajazos.pdf
    • https://indiantalentjunction.com/milan/media/35859808865.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613353643b703---babuzefajegefatefugenu.pdf
    • http://weiken-rc.com/upload/files/53978318569.pdf
    • http://biaikatolikus.hu/files/file/99227013382.pdf
    • https://pmeds.us/userfiles/file/xariforasitafiwirawiwerut.pdf
    • http://mg001.cn/upload_fck/file/2021-9-19/20210919105356792264.pdf
    • http://tbff-bygg.se/img/files/pofexoxaguwuwivifudaniwix.pdf
    • http://www.binghan.my/userfiles/file/75055034558.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/0dfbee243d54809b80ad9b44de38ee50/gizunekajopa.pdf
    • https://onecre.com/images/content/files/motexofirokawo.pdf
    • https://libertyrealestate.in/ckfinder/userfiles/files/84596774454.pdf
    • http://bidwoodmachine.com/d/files/12986333076.pdf
    • https://tannhatviet.vn/upload/files/34480967102.pdf
    • https://medtek.vn/storage/file/xudedamidapivuj.pdf
    • http://pro.ovh.net/~tribuene/images/banque/file/kelevazozuk.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee9a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9A 16792 bytes
font_01_sfnt_off000106b1.bin
dec0b17b9c9a8cec9b96250b065bff8ba6033e7cce312b69cb6d3d0fbb8f2c5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x106B1 10856 bytes
font_02_sfnt_off00011f5b.bin
2ec1675e6567afa2d8cef6045ae2964e2ad1341e6164ff445eb2b6dac2faa391
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5B 18056 bytes