Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb3a8db77a1eba1…

MALICIOUS

PDF

70.3 KB Created: 2021-09-13 09:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 33581b7a7a854317f4cf6b4ae1e61d6b SHA-1: f9020fbeb7cfc1533d7d8cd54139e259b6e200b9 SHA-256: 1fb3a8db77a1eba1ba3e152e5a3dc37b78fb0d5697d54193ec5dae95ecc489f8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'philabc.ru' with a 'download' UTM term, suggesting a lure for users to download potentially harmful content. The PDF structure also indicates it functions as a link farm on disposable hosting, further supporting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • 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.
  • 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://philabc.ru/uplcv?utm_term=download+epsxe+ps1+android PDF link annotation
    • https://nestsearch.in/admin/uploads/file/21930429011.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/78721553055.pdfIn PDF document text
    • https://safecampus.in/cmsCart/upload/file/sodizewedudejumawidotam.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/rujebumasakuram.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/wanisa.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/92270207170.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/49451116009.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/52959172393.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/losopuduvadovuxixuzutokuj.pdfIn PDF document text
    • https://fontan-montag.ru/img/upload/lixopiraferasuwo.pdfIn PDF document text
    • http://marchmont.ru/imgs/file/33122965893.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/83142165335.pdfIn PDF document text
    • http://www.kevimotor-rock.hu/files/files/rovamuwuzekibimidemogu.pdfIn PDF document text
    • http://straps.by/ckfinder/userfiles/files/85578454361.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pufitoxatani.pdfIn PDF document text
    • https://leciv.fr/uploads/FCK_files/file/33495197756.pdfIn PDF document text
    • https://studyhalltracker.com/files/file/43846327378.pdfIn PDF document text
    • https://biharlokmanch.org/userfiles/file/15915721519.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/fisarejojojozaru.pdfIn PDF document text
    • https://www.frontiermea.com/sites/all/libraries/ckfinder/userfiles/files/ketuviletowitisaxakexov.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/78054739943.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_off0000b3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E6 10528 bytes
SHA-256: 95272afa6e319acb13a6542400935fc91674931fd9f6610910a6fd05de25cfec
font_01_sfnt_off0000cc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41E 15420 bytes
SHA-256: d0baafb27b4f8377afb18be26684527e228e5d0428d416150f9c85dbd802f1f4

Open this report in the interactive analyzer, or submit your own file for analysis.