Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e741f542f364c5…

MALICIOUS

PDF

74.0 KB Created: 2021-02-11 21:48:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 3e787621eb540d4b1370daa951a132e9 SHA-1: 8859a2af06cdc1581935bb79b93141ae2c07fdd6 SHA-256: a0e741f542f364c5ccb5ea038b29ac7a1adf33895a73bd2a0d04d6d80597dea1
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains references to popular search terms like 'Floyd Mayweather Manny Pacquiao stream', indicating a lure to attract users to malicious websites. ClamAV detection and ML classifiers further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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 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.
  • 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://druttle.ru/123?utm_term=floyd+mayweather+manny+pacquiao+stream PDF link annotation
    • https://cdn.sqhk.co/sakixowofeg/digngjg/84381762462.pdfIn PDF document text
    • https://cdn.sqhk.co/todezuzutito/7hagfji/herpes_simplex_1_pictures_buttocks.pdfIn PDF document text
    • https://buwupejobo.weebly.com/uploads/1/3/4/2/134265589/a57126245.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzexesetaba/cidJieH/fagoriduxaregoja.pdfIn PDF document text
    • http://femokotafi.66ghz.com/le_guide_du_routard_costa_rica.pdfIn PDF document text
    • http://mifvideo.space/a_passage_to_india09a5o.pdfIn PDF document text
    • https://cdn.sqhk.co/savaketiju/DsggGhe/xijusozixe.pdfIn PDF document text
    • http://josebixotarez.22web.org/tolotisuzolulokiz.pdfIn PDF document text
    • http://datingsexchat.site/best_hashtags_for_content_creatorsrsanx.pdfIn PDF document text
    • https://budorezaru.weebly.com/uploads/1/3/4/8/134859022/tenuvoxafa-zobupule.pdfIn PDF document text
    • https://xufodikufidu.weebly.com/uploads/1/3/5/3/135382923/116452.pdfIn PDF document text
    • https://bulasenojagaroj.weebly.com/uploads/1/3/4/3/134357248/gepadanatakuv-namaz-gepowajotobavov-firoka.pdfIn PDF document text
    • https://segalupozido.weebly.com/uploads/1/3/0/7/130738693/6998188.pdfIn PDF document text
    • https://sarefipa.weebly.com/uploads/1/3/1/3/131398419/84c8680d9bfd.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/wemofodi/18009984114.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/41526037036.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/google_chrome_setup_for_xp.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_off0000e327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE327 5588 bytes
SHA-256: 5193f0dd6709b9fb1c8f1d3ad8a0af2c53eeccad32ff2339eebe2dec1205345e
font_01_sfnt_off0000f615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF615 10596 bytes
SHA-256: 15f532fe34cab275531ee261ec583e7767c1a07825b2634067167dfdd00e7d45

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