Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9970544c4af595e…

MALICIOUS

PDF

153.0 KB Created: 2021-06-24 09:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ad9f72e0359cb43e42febca352411b36 SHA-1: 59afab28b6e3f4605581133161dff37d11ef8330 SHA-256: b9970544c4af595ea226c181dec57f7188cbbd12c3dd7a20ba997f5cba2c6ff3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a link farm pointing to multiple compromised WordPress sites, suggesting a phishing or malware distribution scheme. The embedded content, though obfuscated, appears to be a lure related to Quran stories, likely to trick users into visiting the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • 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 http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fc528b60e---14918057420.pdf In PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/7150c1bbe7ad5031b14168eedd8fbb23/90225523811.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/8ir4n3et8s96pl81jojmdktg85/fulokazajibirawejel.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/zezusas.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3eb345edf3---2476514376.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/1b0c9ebb0db904e32d778c8c01deac05/29444735266.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/3fe043ce6a0d9e7cf61e4eb033811aa9/65725094986.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/79823945678.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/45694488405.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083e6afac3bb---posifufotovopisejufuxewew.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bbecb83d2cd---50981877685.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/dh5o9j07pddv1t26lo8g1amudj/27774022256.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/a332b0ab2c616f18dc04a0b6519ed48b/635510870.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/26741288970.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/78129332522.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090df5c10c15---rixefobiraduvevu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=77+selected+stories+from+the+quran+pdfPDF link annotation
    • 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
    • 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_off0001fb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FB6E 5504 bytes
SHA-256: cc2d1dd2b955c4a75a2a691f80a41687682e4002fa1bf120b1e23f3d4c6e2a4a
font_01_sfnt_off00020dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20DFB 14276 bytes
SHA-256: d4ea10cb0f592ab37d863c58a684c4c14d9d5163f8c9e7dd5a6188e9c8904058
font_02_sfnt_off000239b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x239B5 18248 bytes
SHA-256: f82afff615d30b22fe59455838106b9b4078b2bca942d06be35ad2ec4dc6efdb

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