Malicious PDF — malware analysis report

Static analysis result for SHA-256 95169301c104bf59…

MALICIOUS

PDF

77.3 KB Created: 2021-04-01 00:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d325a40afa2013a50a4fdcc84c83f920 SHA-1: cbf296469d255159b69f84a0fdcc8b8fdf59abe3 SHA-256: 95169301c104bf593a9e6e91b1671af6fe4c1275f35b99b8c90d4629d6792400
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with at least two pointing to suspicious domains ('pelibifir.ru' and 'medianewsonline.com') that are likely part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, suggests a lure related to a book title, potentially to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/award?keyword=around+the+world+in+80+days+express+publishing+pdf PDF link annotation
    • http://buxeletifexid.medianewsonline.com/gubebibivuvugakolamawaw.pdfIn PDF document text
    • https://dudakodut.weebly.com/uploads/1/3/4/4/134497067/xapurerajubes-wibubesijugive.pdfIn PDF document text
    • http://tamakedesununod.mywebcommunity.org/water_pollution_problems_and_solutions.pdfIn PDF document text
    • https://toredakiwireg.weebly.com/uploads/1/3/0/7/130739366/ludumawemowume.pdfIn PDF document text
    • http://sibasijiv.22web.org/harry_potter_6_cast_age.pdfIn PDF document text
    • https://wezoduvum.weebly.com/uploads/1/3/4/0/134096245/5415826.pdfIn PDF document text
    • https://wudizibi.weebly.com/uploads/1/3/4/4/134477582/f8a09d29702cbe3.pdfIn PDF document text
    • https://wibejimexog.weebly.com/uploads/1/3/4/4/134466339/zekoripirupamosu.pdfIn PDF document text
    • https://xagajopudulu.weebly.com/uploads/1/3/4/6/134697977/290045.pdfIn PDF document text
    • http://tigadugutuvatix.mygamesonline.org/26414746741.pdfIn PDF document text
    • https://lerizizevu.weebly.com/uploads/1/3/4/3/134314130/6d10641604.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/32e05363-2224-47d2-a4d9-01465941fe16/nowiwin.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/what_does_arthritis_in_your_upper_back_feel_like.pdfIn PDF document text
    • http://duginufolos.rf.gd/23051725267.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/low_ferritin_normal_hb_guidelines.pdfIn PDF document text
    • http://mamesejo.epizy.com/dotiradusojinazete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3007fda9-edd0-4687-be4d-e77d652fdb16/nivapifixapirupijebo.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/judajidaxatizukelim.pdfIn PDF document text
    • http://dexizijisub.atwebpages.com/fundamentals_of_molecular_virology_2nd_edition.pdfIn PDF document text
    • http://jirunogi.rf.gd/14957900034.pdfIn PDF document text
    • http://nejarisiwudu.atwebpages.com/soundlogic_xt_bluetooth_wireless_headset.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_off0000eb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB97 6028 bytes
SHA-256: b2d01fa75ac60ecd4f196858c3c81146db206a4c8dc99d3e3038b76fc6ca912e
font_01_sfnt_off00010032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10032 11492 bytes
SHA-256: cdba37a383c47ca3a6ef44b1529e5eb7859db8862c96f4d62fafbb60908ca752

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