Malicious PDF — malware analysis report

Static analysis result for SHA-256 e19726a032127714…

MALICIOUS

PDF

78.1 KB Created: 2021-09-24 09:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 81a8a6062ac341a6f5f9a143de66b1c8 SHA-1: 3dd162303884d15eb38c169f607b44ad883a20c9 SHA-256: e19726a0321277140d8fb14eb915dd83d9ba57be8127d574ee1d4c8d91efa34d
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs and the 'SE_CALLBACK_LURE' heuristic strongly suggest a phishing or scam attempt, likely aiming to trick the user into calling a fraudulent support number. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URLs indicate it serves as a lure to malicious content or a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 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://wastran.ru/uplcv?utm_term=android+based+final+year+projects PDF link annotation
    • http://blesk-stroy.ru/userfiles/files/60173676289.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/pikewedefame.pdfIn PDF document text
    • http://willowslakerhea.org/userimages/13719068686.pdfIn PDF document text
    • https://limsurempat.com/contents/files/14896062193.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/roxovenokonirebisen.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614241adb2fbf---52202721219.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/bomitax.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/boxowofazamebaz.pdfIn PDF document text
    • http://www.niceresidence.net/image/upload/File/37097896424.pdfIn PDF document text
    • http://dija.lv/public/userfiles/file/27604540300.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/47566614598.pdfIn PDF document text
    • https://subded.org/userfiles/file/zasidujavumugu.pdfIn PDF document text
    • https://guanlai.tw/uploads/files/202109172347046950.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/61293813868.pdfIn PDF document text
    • https://szelvedojavitasmiskolc.hu/files/files/nuboviminipidaf.pdfIn PDF document text
    • http://birkhoffhi.com/userfiles/files/63330952387.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/428dc37c99611a5e90398f559f09100e/37887446698.pdfIn PDF document text
    • http://vandofigueiredo.com/userfiles/file///xadupezodiletipubon.pdfIn PDF document text
    • http://labradory.pl/file/juwadisafepax.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/sidovi.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/buguxolipuloronakax.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/62443397051.pdfIn PDF document text
    • http://vin-baietii.ro/ckfinder/userfiles/files/jelagonubod.pdfIn PDF document text
    • http://fruitvita.com/files/files/wajebipero.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/17281733533.pdfIn PDF document text
    • https://lapdonline.org/file/65739115364.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE41 16852 bytes
SHA-256: e931deb79ad28f182f5b9849ce52bbf6a9ffde3ce2ac6e0ec7b44922f423796d
font_01_sfnt_off0000f98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A6 10976 bytes
SHA-256: 7b25914d788ff177efaf552adb53f36abe0f95d432eafd929ea68984ae8204d9