Malicious PDF — malware analysis report

Static analysis result for SHA-256 81eba7a23399c8de…

MALICIOUS

PDF

73.7 KB Created: 2021-01-06 16:43:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e7285db85eda070be9d55d471d0dd4ca SHA-1: e15f84acd77b6b0171b27be261c1870756b38cfc SHA-256: 81eba7a23399c8de47bff700af269b150393c0ac1eae9185304d9a7dee7342ba
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one prominent URL pointing to a suspicious domain. ClamAV and ML classifiers also flagged this PDF as malicious, suggesting a phishing or malware distribution intent. While no scripts were directly extracted, the PDF structure and embedded URLs indicate a malicious purpose, likely to redirect users to harmful content.

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://traffnew.ru/123?utm_term=on+action+skill+end PDF link annotation
    • https://pevigegokepos.weebly.com/uploads/1/3/4/3/134366184/moxanabenojuz.pdfIn PDF document text
    • https://lodoxaravejow.weebly.com/uploads/1/3/4/7/134719504/6570515.pdfIn PDF document text
    • https://cdn.sqhk.co/feduminaro/ejaggi6/shark_attack_film_list.pdfIn PDF document text
    • https://vofepelatuj.weebly.com/uploads/1/3/4/7/134768647/4544975.pdfIn PDF document text
    • https://toguvanamevodo.weebly.com/uploads/1/3/4/6/134615804/xexugewekofafo.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/hisA3gd/zajaxazemok.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/29b6c39a-f090-45cc-82c4-3497bcc6ec5f/38022179374.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/73499598859.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/although_though_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/android_binder_example_c.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/lanthanides_and_actinides_in_molecular_magnetism.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/google_play_console_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/4428673965.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/pokemon_game_fire_red_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/gonexoruwusa.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/3729289380.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_off0000e3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F4 4928 bytes
SHA-256: 72af7bd4210da3b4dbd0a2aedcb11f8fb3df7495c1bf1d0f5892487e8364456f
font_01_sfnt_off0000f4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C8 10816 bytes
SHA-256: a242e1ca9b7f0c44ffbf2e0ef4c7bb61759d856e74b3bfdcd621cfcaed731166

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