Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1634e7167fab348…

MALICIOUS

PDF

71.8 KB Created: 2020-12-25 07:57:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3577fb0230f13b426d8f34e6365cbee6 SHA-1: 2c8fd4fb3fd23fb0fc95bbb75d9bd3a3b232b128 SHA-256: f1634e7167fab348111ab8d831faeaeb098c0b396f1256537355ac3ab3b681b8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many of which point to potentially malicious domains, and one specific URL is identified as an external URI. The document body, though heavily obfuscated, suggests a lure related to 'ringtones', likely a pretext to drive traffic to malicious sites. The presence of numerous external links indicates a link farm or redirection strategy, common in phishing and malware distribution campaigns.

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 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://traffnew.ru/strik?utm_term=top+100+new+ringtones+free+for+android+phone PDF link annotation
    • https://cdn.sqhk.co/solumapidema/hijigxt/85500356168.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/agihaij/vidon.pdfIn PDF document text
    • https://cdn.sqhk.co/kupemopo/fjbhijj/guess_the_movie_emoji_quiz_diva_answers.pdfIn PDF document text
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/0fbdbb4ef.pdfIn PDF document text
    • https://cdn.sqhk.co/fejavegiwo/9giGhcF/9362783020.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/fibjdgc/darkness_survival_wiki.pdfIn PDF document text
    • https://wukemurorafol.weebly.com/uploads/1/3/4/3/134338373/wivusime.pdfIn PDF document text
    • https://cdn.sqhk.co/pofevadamem/icsTZjb/hair_salons_open_on_sunday_in_baton_rouge.pdfIn PDF document text
    • https://rasabuziwoziw.weebly.com/uploads/1/3/4/5/134577474/nirafebudox.pdfIn PDF document text
    • https://cdn.sqhk.co/lasesekov/ihegfii/67867653262.pdfIn PDF document text
    • https://difegalit.weebly.com/uploads/1/3/2/6/132681294/5164559.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/e64512a0-6ac1-4272-bfea-bc41d1f16f28/81873154183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac1b200f-2640-4c30-b3e2-2a3ffdd3f8e8/37603752715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc58d93b-116b-4e19-b843-209f87eea105/4k_video_downloader_key_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07480d31-a5f7-4768-a740-55c281e43d0d/journey_to_the_west_book_in_chinese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5107440-08fb-4e65-997c-f5e50af3b05b/amana_tandem_7300_dryer_thermal_fuse_location.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD951 5504 bytes
SHA-256: fd8c6f5f951546ffe6f664241a27714f742366002cd824795d839fdc5c8a5b06
font_01_sfnt_off0000ec24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC24 10976 bytes
SHA-256: ac976f0fad296898a258bcb15cb0e9a6ee42a5509508b66c04c46a65d7c005c7

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