Malicious PDF — malware analysis report

Static analysis result for SHA-256 34aaa7b494b36673…

MALICIOUS

PDF

84.5 KB Created: 2021-07-23 00:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2cbeee9c385bcde36227e1e1dff32415 SHA-1: bbb6e86e39d378a03671be8391f05db6436295f4 SHA-256: 34aaa7b494b366738e009069e1c41c96125d7e38308f96850c52111058b2555e
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including ML and ClamAV, as malicious. The presence of a PDF_SEO_UTM_REDIRECTOR_LINK heuristic indicates the document uses an image lure to redirect users to a URL, a common tactic for phishing or malware delivery. Although the specific URLs extracted were labeled as confirmed benign, the overall structure and detection results strongly suggest a malicious intent, likely related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://feedproxy.google.com/~r/razvivatel/yapz/~3/v-xubMviL4Y/square?utm_term=pisces+day+after+tomorrow PDF link annotation
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f8a3c09f96d85b0b8dbcee/1626907584675/increase_photo_size_in_kb.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f54a6e7121636e99b8072a/1626688110546/talk_to_me_sonny_and_the_sunliners.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f661cbb2b0835cff99db1a/1626759627918/muscles_that_control_eye_movement.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f8f2d4a663f73b0a5afac6/1626927828830/physics_for_architects.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee37702ee8b51fd934e3b4/1626224496316/bataruxobike.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f64b64357ac316222c1ff7/1626753892176/wegujaxonesirujetibefeva.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f8045cbad1557b4161fa89/1626866780411/36986743152.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f85dae2ad36449f6a86f42/1626889646935/tokumuxivelusevapoleledid.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e91d99b9b95949b65e9bcf/1625890201588/2nd_puc_physics_question_paper_2017_march_with_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f260a327519501fc086311/1626497188087/53249475770.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f09f40ad39913da95d5d52/1626382144555/best_stretched_resolution_fortnite_chapter_2.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec8c8e83836e7a7d617971/1626115215116/melalewapuro.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f6ca9e89f57b2d412d0ff7/1626786462472/crucible_study_guide_answers_act_2.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee5b8cdb6052518ec87df7/1626233740910/66696502038.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f079fe78400126083c1671/1626372606953/historical_institutionalism_in_contemporary_political_science.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60eff3810dea5e4896bc8cd0/1626338177852/bargaining_power_of_buyers_in_telecommunication_industry.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE629 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3B 17016 bytes
SHA-256: 34dc1f39eef221fa99ab8dd73197984764f9682f28ea57d9ee1c37ad053c7588
font_02_sfnt_off00012a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6D 10688 bytes
SHA-256: b34676a0207170b2363e09dbb6547c2c55207487fc3c580d5649d0890627c957