Malicious PDF — malware analysis report

Static analysis result for SHA-256 54110aed3f0fd17a…

MALICIOUS

PDF

81.5 KB Created: 2021-02-21 20:03:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 53e0c36423dd60d8e2520f6cc11d5027 SHA-1: 22c7cce14518efb2670354cc6302e58fef9babeb SHA-256: 54110aed3f0fd17a78c2d418a3f7dabcd027060b2ee984b11f70dea7d26d8ab8
226 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing campaign. The embedded URLs and the document's structure indicate an attempt to redirect users to potentially harmful content, possibly for SEO manipulation or to host malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://jottigo.ru/123?utm_term=how+to+ask+boyfriend+about+commitment PDF link annotation
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/6709881.pdfIn PDF document text
    • https://tefajarusi.weebly.com/uploads/1/3/0/7/130775660/3139107.pdfIn PDF document text
    • http://khareedforosh.com/samusubefewakom370h.pdfIn PDF document text
    • https://duzareledibasa.weebly.com/uploads/1/3/4/8/134890493/0ef3814c3b818d6.pdfIn PDF document text
    • https://wosumugip.weebly.com/uploads/1/3/4/8/134867897/953554.pdfIn PDF document text
    • https://vulopinuvi.weebly.com/uploads/1/3/1/1/131164419/vinowagewopelagulo.pdfIn PDF document text
    • https://vekowafonomi.weebly.com/uploads/1/3/4/6/134692424/mipor.pdfIn PDF document text
    • http://privateguardingserviceagainstdanger.site/pfsense_install_guideg2gtn.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/logagexip.pdfIn PDF document text
    • http://rastet-malysh.ru/ford_mustang_gt_2020_price_in_uaesumss.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/ladotugunesuxig_pumuvaxujutuk.pdfIn PDF document text
    • https://femovoba.weebly.com/uploads/1/3/0/7/130775826/4dbaa9711929.pdfIn PDF document text
    • https://wagalivo.weebly.com/uploads/1/3/0/8/130814328/5181901.pdfIn PDF document text
    • http://mastericy-chistoty.ru/tafudelu5pfr6.pdfIn PDF document text
    • https://wizenifove.weebly.com/uploads/1/3/4/3/134308138/8168112.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/nokiva/ahirani_comedy_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/remove_child_nodes_firebase_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/desinisakopor.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/wezusuwuxularaw.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_off00010388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10388 5492 bytes
SHA-256: 2f69fed541619c04ea2caba75d1aca425fa289157e2694d807e3f3ad50c81a90
font_01_sfnt_off0001163f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163F 10092 bytes
SHA-256: ce18c76ae7ae945ce9c7501f52927b633c155e08848b1d632d0cb59d9d3850ea

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