Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9a1b023beedcca…

MALICIOUS

PDF

83.7 KB Created: 2021-03-20 18:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b836ecefe7363df2977147d710e92372 SHA-1: ea68499ee0443f604d2757cd4b540cb0636c2ee8 SHA-256: eb9a1b023beedccaa69058cbc248709b8d07783c6249e9223d7922468d176065
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to Weebly and Strikingly hosted PDFs, suggesting a link farm or SEO spam operation. One of the embedded URLs, 'https://soxebez.ru/award?keyword=abstract+example+for+thesis+pdf', is particularly suspicious and likely serves as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=abstract+example+for+thesis+pdf
    • https://zojunakalej.weebly.com/uploads/1/3/2/6/132682915/junenabadewofeki.pdf
    • https://gisonegeviwobi.weebly.com/uploads/1/3/1/3/131383673/359e79d5.pdf
    • https://wulelosen.weebly.com/uploads/1/3/5/9/135992808/rowubidonoro-folot.pdf
    • https://kixusoboli.weebly.com/uploads/1/3/5/3/135394292/2862291.pdf
    • http://xolidila.iblogger.org/2018_calendar_with_holidays_template.pdf
    • https://vegonivi.weebly.com/uploads/1/3/5/9/135986737/megoriruri.pdf
    • http://siraxadujegari.iblogger.org/starbucks_coffee_cups_states.pdf
    • https://fupomojokom.weebly.com/uploads/1/3/4/4/134458651/zalidomupaziguwuga.pdf
    • http://nefuwumimo.iblogger.org/jurassic_world_hd_tamil.pdf
    • https://jaxurawutedoma.weebly.com/uploads/1/3/0/7/130739660/2799780.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cec295c6-ae21-4475-8dba-f9763280c18e/bumageva.pdf
    • https://uploads.strikinglycdn.com/files/62da9464-3cfd-46c1-af4b-bceca491dc0d/what_are_great_netflix_series.pdf
    • https://uploads.strikinglycdn.com/files/32b4d167-dadb-4189-80bd-321e8b02f269/bowflex_treadclimber_tc10_manual.pdf
    • https://uploads.strikinglycdn.com/files/f21e4c09-fba0-48ab-a1cd-f9bccba948bd/46539610820.pdf
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_49fef0707a004aa2b3ab0a2eebe7843a.pdf?index=true
    • http://fosekor.epizy.com/88852651453.pdf
    • https://uploads.strikinglycdn.com/files/1dbe9c7e-e13d-48d0-b6b8-c7cbd70ffd6d/56980261820.pdf
    • https://48bd7725-9370-4d18-884e-e75d7b70c9c4.filesusr.com/ugd/f241d9_352661fa3b074d01a6770099902cc8a7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/43a2c911-e764-4c22-8161-f17a74c2065b/what_do_the_words_pax_romana_mean_in_latin.pdf
    • https://uploads.strikinglycdn.com/files/0fb8a7da-aae8-447c-ada4-ad77b78e91c7/what_is_the_price_of_kenneth_cole_watch.pdf
    • https://uploads.strikinglycdn.com/files/84e9def4-5f45-4b22-9493-ae1f260c1c2f/rejapimorijukodivalopipaw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001098f.bin
856aa2202c5b23a407f8aa036f9080d01a51bdb6e573848c5c6efd8091a9ad39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1098F 5592 bytes
font_01_sfnt_off00011c65.bin
e8a0c6e1fe7ce76addc1d2382848a02d2c80353ac93ebfa04e5098378ffc697e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C65 10452 bytes

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