Malicious PDF — malware analysis report

Static analysis result for SHA-256 b462c285f83c95ce…

MALICIOUS

PDF

101.9 KB Created: 2021-05-21 07:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ad3ef2b3529bcba66ac0c4191cc246fa SHA-1: 56a73ec394717151a7f2a2227773fed3a698f50c SHA-256: b462c285f83c95ce1dc85fe110dd016d270f517cccf14572dfe9cf1c9f6f96b6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The embedded URL `https://soxebez.ru/strik?utm_term=toram+online+hack+spina+and+orbs` indicates a lure related to game hacking. ClamAV and ML classifiers confirm its malicious nature, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=toram+online+hack+spina+and+orbs PDF link annotation
    • https://fesuxuxij.weebly.com/uploads/1/3/4/6/134693362/motakivivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471082/normal_5fd673a5a8de0.pdfIn PDF document text
    • https://zonozedu.weebly.com/uploads/1/3/0/8/130874021/ketufutav.pdfIn PDF document text
    • https://xifugewelude.weebly.com/uploads/1/3/4/3/134353264/wajesiwojug-wevob-damanepizekaj-bulason.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476952/normal_60301ea68dfe3.pdfIn PDF document text
    • https://nikevafojo.weebly.com/uploads/1/3/4/6/134680040/04d073d9.pdfIn PDF document text
    • https://webesamogamafi.weebly.com/uploads/1/3/4/0/134012635/1f70a5bdf074963.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484995/normal_606b7ae1d8836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448719/normal_602841d687a42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369310/normal_5ff457067adef.pdfIn PDF document text
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/57f4b503fd2ecdf.pdfIn PDF document text
    • https://gabodubelekopo.weebly.com/uploads/1/3/4/3/134356924/tejenil_pakedeturef.pdfIn PDF document text
    • https://pulijapejupexeb.weebly.com/uploads/1/3/4/0/134041872/3902628.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389104/normal_602c787633a17.pdfIn PDF document text
    • https://totorososine.weebly.com/uploads/1/3/4/8/134892144/tuzakajixo_buvosese.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7a8ae69-3303-4259-aa0e-cdd76e817a61/75424976650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9af54ee4-3c7c-4b4b-a778-88123f97f209/26240242382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4e7e571-439d-4195-a9ca-98b3daac62cc/68161596301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f62e34d4-5377-464a-aad3-202046dd61e9/22997074823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b4eede-1b60-4911-8208-8091f536fc8a/fijidubof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0314c86c-1b0a-4966-84be-1bd77dd92967/32791062561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f57b119c-00c1-4ad4-a3b1-77757230be7b/kuterumika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76543588-8961-472f-af3e-8d8c11e06649/31714337996.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00016673.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16673 19836 bytes
SHA-256: 1db0b70ffc2d4185c18d8a6728f0b8633e65544c7f14e0d2d8add890497ff85d
font_00_sfnt_off00011ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA2 6744 bytes
SHA-256: ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425
font_01_sfnt_off00012f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8A 5464 bytes
SHA-256: df7717b0e10fcdfeb629cad21911c4727d122b21d8cf732e1270949a052d69e7
font_02_sfnt_off000141e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E5 10600 bytes
SHA-256: fdd341e41e151a577eae2cdbbd00c87adc8412e58716e0a4a412b22c0fafcda9

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