Malicious PDF — malware analysis report

Static analysis result for SHA-256 d026c700446a39ff…

MALICIOUS

PDF

73.2 KB Created: 2020-12-21 21:19:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ed91e1b0a72cbc168f830d25d5cf63c SHA-1: 1d59b0ded8e6eb5376b3a53131f0cb49ce8d49de SHA-256: d026c700446a39ff347c44c3a26104d31c5cd5be3f4b8ebd2fae18d463a608d5
164 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of external URIs, including a link farm heuristic, suggests an attempt to manipulate search engine results or redirect users to malicious sites. The 'SE_DOWNLOAD_BUTTON' heuristic further supports a phishing or social engineering attack vector, aiming to trick users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/strik?utm_term=enemy+strike+mod+apk+latest+version
    • https://misodewegakev.weebly.com/uploads/1/3/4/7/134717908/jabavipa_figitulaxujajun.pdf
    • https://cdn-cms.f-static.net/uploads/4460048/normal_5fa3915c12390.pdf
    • https://cdn-cms.f-static.net/uploads/4393018/normal_5f98444227540.pdf
    • https://bozobamawokoruv.weebly.com/uploads/1/3/4/3/134350924/narakolare.pdf
    • https://musejeruz.weebly.com/uploads/1/3/4/7/134740211/4456072.pdf
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/4907837.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://uploads.strikinglycdn.com/files/56e66447-bc2f-4328-9bf8-bee4964f5b6a/animal_farm_chapter_3_summary.pdf
    • https://s3.amazonaws.com/jesidofefe/64100447197.pdf
    • https://uploads.strikinglycdn.com/files/cd24c6d2-62e2-491f-ad9d-8ede274691ef/the_lion_the_witch_and_the_wardrobe_chapters_15-17.pdf
    • https://uploads.strikinglycdn.com/files/8637b9bd-b34f-4275-952e-a94461ca48cd/wesek.pdf
    • https://s3.amazonaws.com/faduxodiwo/free_ukulele_fingerpicking_sheet_music.pdf
    • https://s3.amazonaws.com/jiguwuzobozobaz/angband_beginners_guide.pdf
    • https://s3.amazonaws.com/kiguteperilodu/european_society_of_cardiology_guidelines_pregnancy.pdf
    • https://uploads.strikinglycdn.com/files/793296a1-151b-4921-b627-ac5aec00a70d/fitness_connection_cancellation_dallas.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6cc.bin
d8a69c0c70731a9bd02925c68638e374ae02c919c405ccfb09575573a5d8700c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CC 3556 bytes
font_01_sfnt_off0000d383.bin
7d3bb567efeabf89b492efb1f6a24045902adecffc3746892cd07351f3720420		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD383 5288 bytes
font_02_sfnt_off0000e570.bin
0d4090b31015ca3894560289736e2239077761925d95788f047a26f23c7b4c2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE570 5748 bytes
font_03_sfnt_off0000f3ce.bin
ccb42da9dbb2c8a74c4b352e7da8fbbb7d2254eb990723197e8094eeb1b978d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CE 10464 bytes

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