Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddda46ff60a29dca…

MALICIOUS

PDF

73.0 KB Created: 2021-04-01 16:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1db44c8b1d7e59a2a6df747444f4d3fb SHA-1: 067d74bf8365ddee6f676c3303078b671ddc1157 SHA-256: ddda46ff60a29dca3615e6331cf63af3d1ce863bcbc99f8abaef465120ab7bb4
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an external URI pointing to a suspicious domain, likely used for phishing or to host a secondary payload. The document body, though heavily obfuscated, suggests a lure related to data analysis to entice users to click the malicious link.

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
  • 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://midufefew.ru/award?keyword=performing+data+analysis+using+ibm+spss+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499021/normal_60463db15a311.pdfIn PDF document text
    • http://cmb-societe.com/total_studio_2_max_review5o5gh.pdfIn PDF document text
    • http://itslm.fun/babylon_mystery_religion_booktlsq1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401540/normal_5fec8af40042f.pdfIn PDF document text
    • http://1xbet-football.fun/how_much_is_a_jitterbug_phone_cost60uz3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422906/normal_6056aaf2cb6ef.pdfIn PDF document text
    • http://fitdieta.com/what_is_the_passing_criteria_for_cfa_level_1v0uwa.pdfIn PDF document text
    • http://mynasert.online/33503421340iannx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5fd13b620dfbe.pdfIn PDF document text
    • http://copyrightprivacy.site/27453442509cdlj7.pdfIn PDF document text
    • http://instasale.company/31339456325tkspu.pdfIn PDF document text
    • http://ru-1.casa/poratuzotuduvijiwogozenaboa0i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://siwomiwededu.epizy.com/19442507602.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/iron_carbide_phase_diagram_explanation.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/96005491191.pdfIn PDF document text
    • http://pavitekoruw.rf.gd/sibudopavaxezun.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/samsung_hw-j355_2.1_sound_bar_manual.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_off0000df1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1E 5604 bytes
SHA-256: f7b3a2a83a5ae20758a41d7b2a866249641110f8ca757993af87f054580bcce7
font_01_sfnt_off0000f21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21A 10780 bytes
SHA-256: d3f09f42efe7a40daf384bd683ea781312ce321a2bfffd8c60f796e72220aead

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