Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e368da70c4c9f68…

MALICIOUS

PDF

73.8 KB Created: 2021-02-11 16:39:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bae3ec462212376e0cfefb795320a56f SHA-1: e48dc4f55bf8a44489d8caf3343fd7942d416e5e SHA-256: 4e368da70c4c9f68ba0ab19e4b4b8f7d38cdcbf3ba2d726a30bd57a2d2023a6b
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal Web Session Cookie T1056.004 Web Browser

The sample was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The 'SE_MFA_LURE' heuristic strongly suggests the document attempts to harvest credentials or MFA approval. The presence of numerous external links, including a link farm detected by PDF_SEO_LINK_FARM, indicates a phishing or scamming operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://bologen.ru/123?utm_term=pink+lady+and+jeff+youtube PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412895/normal_5fe1d866ee27e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_600dc5ab7e229.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375353/normal_5fcff5d511001.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/cjdibjd/runolozelixajiko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_602530febfcca.pdfIn PDF document text
    • https://zorikibezoxima.weebly.com/uploads/1/3/1/3/131384208/2412751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_6010522e09236.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370275/normal_5fe4f59d04335.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488822/normal_5ff54b2ba2bd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388820/normal_6001071826ef7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/happy_manila_all_song_mr_jatt.pdfIn PDF document text
    • http://timonuxe.rf.gd/53086931211.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/cracker_barrel_menu_dinner.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/calcium_channel_blockers_mechanism_of_action.pdfIn PDF document text
    • http://durunorutap.epizy.com/29989375253.pdfIn PDF document text
    • http://xigurig.rf.gd/chutti_tv_programs_free_tamil.pdfIn PDF document text
    • http://fajopiraketave.epizy.com/telegumelivejo.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE388 5012 bytes
SHA-256: 6d467ea9f765017fdb00ea8f511bce1de9a123110676e902cf525bbc2a2e851f
font_01_sfnt_off0000f4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BF 10864 bytes
SHA-256: f0a7fe8d7f27188a05a1de954318c4d87434a0ebf8b7742cbae466d5c26a49f1

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