Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54596991b5d7bcf…

MALICIOUS

PDF

84.5 KB Created: 2021-09-20 21:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: acb3549719aff4321a44ca6e2d9e68d6 SHA-1: 561b79b5564e30b15449541f16cbc0505beef8cd SHA-256: f54596991b5d7bcf7b1ee015d15d15bd6a8d5833839d7fd10501af36f8b1d981
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=hidden+apps+on+my+device PDF link annotation
    • https://textosolutionslinguistiques.ca/upload/editor/file/kirexewilexituzomefixize.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/6856295029.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/78166382910.pdfIn PDF document text
    • https://ozanetiket.com/TasarimAcarnet/serhali/upload/files/21005465168.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/96336582626.pdfIn PDF document text
    • http://silarperu.com/UserFiles/file/kobumeded.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/deroril.pdfIn PDF document text
    • http://dpnovelty.com/upload/files/zajuf.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/wowatuwezojudejixi.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/60480908521.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/mojel.pdfIn PDF document text
    • https://datajournonepal.org/files/tekaxifixato.pdfIn PDF document text
    • http://kmjmt.com/news/upload/file/210912084812148586cpnzol.pdfIn PDF document text
    • http://tlumacz-francuskiego.pl/userfiles/file/41923863218.pdfIn PDF document text
    • http://netichikawaya.com/userfiles/file/26557446281.pdfIn PDF document text
    • https://clubon.top/uploads/files/romifubotarovis.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/fenijudugaserewokilebenap.pdfIn PDF document text
    • https://lideregitimpaketleri.com/calisma2/files/uploads/mubunasezunataluwukedi.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/gopafomisukebowuxarudumer.pdfIn PDF document text
    • https://braveathlete.net/geektic/files/93849806547.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/zawixubajediva.pdfIn PDF document text
    • http://pytextiles.com/userfiles/file/81744511023.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_off0000e620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE620 10600 bytes
SHA-256: faf72a485fbb2fe91200399262ab883739318c16be645f103f40cc0adeeff2d9
font_01_sfnt_off0000fe4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001165f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165F 17980 bytes
SHA-256: ac1beb833dab35b98d7974d6fd42f07e1d11cdbac2e15676184160bc0d470c03

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