Malicious PDF — malware analysis report

Static analysis result for SHA-256 d005875430569cde…

MALICIOUS

PDF

88.9 KB Created: 2021-04-01 10:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0b440647abb315c5096d9ee628c25d77 SHA-1: f803f1e3a7793a97de47b411a8671369accf93a9 SHA-256: d005875430569cde40909eb2cc0e1c57aec95a89ce0036a550199882f46f45b4
164 Risk Score

Malware Insights

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

The sample was identified as malicious by a ML classifier and ClamAV, with critical heuristics indicating a PDF link farm. The document body is heavily obfuscated, but the presence of numerous external links, including one to 'leonvi.ru', suggests a potential phishing or SEO manipulation attempt. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://leonvi.ru/strik?utm_term=the+iron+curtain+over+america+john+beaty PDF link annotation
    • http://pebifakonek.sportsontheweb.net/82732969541.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/lefevexipojazojo.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/hchhLjc/vemed.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/QjjB9KE/hockey_goalie_shot_tracker.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ropuba/bodyguard_full_movie_hd_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df70f6ec-088b-42b6-b2cd-dc8ae839e14e/52765243429.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/leave_form_template_google_docs.pdfIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/was_it_all_a_dream_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/new_york_times_36_questions_to_ask_before_marriage.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/50405894702.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/dictionary_oxford_english_to_urdu_free.pdfIn PDF document text
    • http://womawujun.atwebpages.com/wibibeg.pdfIn PDF document text
    • https://68f2566a-c586-4d15-a5d1-3a72044c38f3.filesusr.com/ugd/ecec20_438e3c336e3f4da580b844d087fb69b5.pdf?index=trueIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_8f3df383f37b4c0c978f218cd4b14bec.pdf?index=trueIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_9c2418884fc246078ba38dad409e7a38.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d5bc173-5afe-459f-a90f-c729073e93cf/braun_coffee_maker_filter.pdfIn PDF document text
    • https://19527f6f-7821-4b33-8e58-d909ab9a203f.filesusr.com/ugd/b18fc6_d18e78be475541c1836c3a236e7dad56.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F61 5040 bytes
SHA-256: 965dcad888ac65772bd6270bf72fa83f71e20adbba7e83d6f511fd3113119586
font_01_sfnt_off00012061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12061 11828 bytes
SHA-256: 83c77e698bbb2fda102ca0bc0c6a6c7e4c2d1485f87f958e75a14c6eea09b244
font_02_sfnt_off00014856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14856 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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