Malicious PDF — malware analysis report

Static analysis result for SHA-256 816fcd2998861ce2…

MALICIOUS

PDF

69.8 KB Created: 2020-12-15 15:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 84966ad1856c75285396b83fca31eda6 SHA-1: 4a577a8df8b12ea4a1e8480ea54dc3ad72050d11 SHA-256: 816fcd2998861ce294168ed68c9f798c01ddcb3829f6c7a5d37e515657a91adb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used in link farm attacks or to redirect users to malicious sites. ClamAV and ML classifiers identified this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the overall structure suggest an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://trafficel.ru/123?utm_term=cross+cultural+risk+in+international+business PDF link annotation
    • https://wilubowedawiwo.weebly.com/uploads/1/3/4/5/134528918/vedoxanena-zisupodemo.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/cad066d6-02a9-4180-acb0-a4c03349ca71/lexigabawara.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2c204c30a162e0c5e803a/t/5fc38691eaf37e3b640992fa/1606649489582/pawojamepejatagozopatuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a133bb14-0fd7-467d-81f1-4aa0436d652c/24365439251.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5be32116eb00e3c6d2e31/t/5fd7298b7fc52c20693e78fd/1607936396480/ux_user_journey_map_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db6511a4-6e02-4667-9a1e-59828d46dbc5/21358501964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6d0be80-1dc3-47bf-a909-9cc7b81e5703/nepedazixuzime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e098809-5f75-4f8a-b80d-74ceb266edc1/negosawibikafanoda.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e694085bf90c0e16c363/t/5fc554e05147b14804e31218/1606767840734/befabexilusodovox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/266a4925-b2c7-4fc2-ac4e-e6054968eebf/recaro_baby_seat_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82db0c32-a185-4910-bf65-d64345a81615/esfj_personality_strengths_and_weaknesses.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_off0000d5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B3 4904 bytes
SHA-256: 9161c0fc73e58f876c47d7fe297791b4a4c3a77ef62ae9d51636e38fcd4e87ea
font_01_sfnt_off0000e66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66E 10472 bytes
SHA-256: 1d2da231b9312ff0d91271b4f8c61fd357a006ca22223c751171a4bdb1e4954f

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