Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddf97db90b21b1df…

MALICIOUS

PDF

107.8 KB Created: 2020-12-20 23:44:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 068f0a237bdd36e65f5d314a9ea13dd2 SHA-1: 73933909434f446a1e1ed304547f210b7201cc31 SHA-256: ddf97db90b21b1df3fc40d11746d0b381f212c057b589c435c365ee9a9d9910b
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or link farms, indicating a malicious intent to direct users to potentially harmful sites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=gravity+movie+summary+spoiler In PDF document text
    • https://buxexemap.weebly.com/uploads/1/3/4/8/134890763/moleb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476595/normal_5fa67b454bd20.pdfIn PDF document text
    • https://vedegidimojota.weebly.com/uploads/1/3/4/5/134597995/568521.pdfIn PDF document text
    • https://kutemipemowu.weebly.com/uploads/1/3/4/8/134860595/1405373.pdfIn PDF document text
    • https://sugelama.weebly.com/uploads/1/3/4/8/134898925/fetesixefifex-pisojuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384628/normal_5f8eb39a0095d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494436/normal_5fbb36437b754.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376619/normal_5f956cb29cad2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_5fa7c10198f13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc71355e2afa34b64acbd35/t/5fd0e357c0a29916a57798fa/1607525208234/idle_city_building_tycoon.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc729495f0d731e16aabfad/t/5fc87bc0d6e0cc37e33e7cb8/1606974403159/might_and_glory_kingdom_war.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce2110e1a8af6ff4af999e/t/5fd72f00de5b1220c04488ef/1607937792533/koenig_nespresso_machine_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1cbe78ef7301f8b171054/t/5fc5666ea97599144eaeb2a3/1606772337773/whaff_rewards_apk_hack.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc537ae0a2757459bff2ea8/t/5fd14d81c354811bd59e3404/1607552386951/fastest_bowling_ball_speed_world_record.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_off00016618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16618 5160 bytes
SHA-256: 2ba09cc37ad9a448fed9a8fec423924580e4659f36d247de9abdb1c1777f6aa2
font_01_sfnt_off0001779c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1779C 13100 bytes
SHA-256: e4bc91bf1617b4d0bd47ee6f51ea1850e41bef2d707a38243aa8be10512d884f

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