Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3f327712b5b53a…

MALICIOUS

PDF

67.7 KB Created: 2020-12-16 17:59:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43eeb07373535c25827bf4b6a4f57502 SHA-1: 79e21a044a6aa46e2436c6cd4d0acfb56e46dcff SHA-256: 4e3f327712b5b53a6cdc37d6ef3b492974b50a1edfca326c269a94cc9a9c90fb
154 Risk Score

Malware Insights

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

The PDF contains an embedded link that points to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of a malicious URL is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/strik?utm_term=in+the+diagram+of+circle+a+what+is+m
    • https://lusenivusimutom.weebly.com/uploads/1/3/4/8/134887898/tepidom_ketuxedevewa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ad227868-0624-4b82-b44c-c9a3c419b1f5/xopopotelikesotidewaxog.pdf
    • https://s3.amazonaws.com/marimejerebo/20861510465.pdf
    • https://static1.squarespace.com/static/5fc4c7fb60f2895dc100b623/t/5fcc9f0005ddc9599d1cc375/1607245570069/real_steel_world_robot_boxing_apk_latest_version.pdf
    • https://static1.squarespace.com/static/5fc2902d1452f90b7fefcf7d/t/5fc4cecfcb3e0f5771e6cf48/1606733519394/not_yo_mamas_banana_pudding_printable_recipe.pdf
    • https://uploads.strikinglycdn.com/files/f0d2e7e0-9e74-473c-87e5-61f2b9a95fea/8757373085.pdf
    • https://static1.squarespace.com/static/5fc1520988c99b6d37aa082c/t/5fd1fad3880fa23343d88082/1607596756595/how_to_draw_monstera_leaves_step_by_step.pdf
    • https://uploads.strikinglycdn.com/files/fc6fe07f-a087-437e-b925-13db5fa1343d/how_to_draw_in_microsoft_word_2013.pdf
    • https://s3.amazonaws.com/ribowexulo/35924006964.pdf
    • https://static1.squarespace.com/static/5fcdecefea95a9497c03c9c3/t/5fd1602323f2866aa37b1dc5/1607557155693/56134595509.pdf
    • https://static1.squarespace.com/static/5fc4da975bcb0228a29bc7b8/t/5fca4ccf196a600d3c3f6196/1607093456278/luke_combs_new_album_songs_youtube.pdf
    • https://static1.squarespace.com/static/5fc0f8f692c50b1a1e77efcd/t/5fc177da9d79364840c523db/1606514653522/do_not_go_gentle_into_that_good_night_analysis_worksheet.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc7f.bin
03f535d7e854b3e674a8120edf40702ec253d643674ca73cc5513bcd0d11b55f
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7F 5464 bytes
font_01_sfnt_off0000defc.bin
2384ecc71e9baae0fd08685e6371ab101fb282b69c384b2cdbbda0b72a66ce69
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFC 10360 bytes