Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f339b68d6dd4168…

MALICIOUS

PDF

72.9 KB Created: 2021-02-17 02:44:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7bc1a0e1010e41e41bcb9789377a656e SHA-1: a6b007508130ab0ba894e0d31e1b3ee8d4380056 SHA-256: 4f339b68d6dd41683e227363fb2ee487b1a6414b7b3ad1dacbbae4d84295508c
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The heuristic PDF_SEO_LINK_FARM indicates the presence of a large number of external links, with one prominent example being a Weebly hosted PDF. The embedded URL `https://bologen.ru/123?utm_term=moon+river+songwriter` is also suspicious. While no scripts were explicitly extracted, the nature of the heuristics suggests a phishing or SEO manipulation attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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=moon+river+songwriter PDF link annotation
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/4197547.pdfIn PDF document text
    • http://zevixoleg.iblogger.org/photo_banana_game.pdfIn PDF document text
    • https://pomorewosijimop.weebly.com/uploads/1/3/2/6/132681296/genifi_livixepomofot_gowukora_penige.pdfIn PDF document text
    • https://dolilifiwu.weebly.com/uploads/1/3/4/4/134401054/pafubivapalo.pdfIn PDF document text
    • https://bifimazetaxa.weebly.com/uploads/1/3/5/3/135326975/e505bc5.pdfIn PDF document text
    • https://retumitoratosu.weebly.com/uploads/1/3/4/2/134234586/tujiru.pdfIn PDF document text
    • https://cdn.sqhk.co/pegebatanuz/gfIFwgd/amigo_pancho_2_level_54.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mawugosujutesag.epizy.com/nekojuwene.pdfIn PDF document text
    • http://jagofebasej.epizy.com/atelier_lulua_switch_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/businessman_telugu_movie_songs_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/lefuw.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/mozilla_reference_browser_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/lazifumorewusoma.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/limozulogixurolipudaj.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/gosesuvajugivugow.pdfIn PDF document text
    • http://xujijanuzovaziv.rf.gd/47023953005.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/69215942880.pdfIn PDF document text
    • http://bibobega.epizy.com/beelzebub_episode_43_sub_indo.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_off0000e1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FC 4768 bytes
SHA-256: 0bf637f014415c09f42883933a018570e7862a1f0488eb2686977f02f16164a0
font_01_sfnt_off0000f266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF266 10560 bytes
SHA-256: b92edf1496c52195ed691c8a761d13ebf75e962d44ed285eba5841bdbae3d54b

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