Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d5d741d80360618…

MALICIOUS

PDF

103.5 KB Created: 2021-07-23 00:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e64cb342e0092de9343580a2cc43491e SHA-1: 6516d34e1613ba00d742dc41ef195610588d0998 SHA-256: 8d5d741d8036061818ac1d1373b6e42d2e6fcc4fd084213efeb3c25a2471d725
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the use of an image lure linking to an SEO redirector, suggesting a phishing attempt. While no scripts were directly extracted, the PDF structure and heuristics point towards a malicious document designed to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/sq/ugae/~3/AG-UZpNbJGc/square?utm_term=what+does+2ah+battery+mean PDF link annotation
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f5389ddb752c5e49c1f506/1626683549327/77696928886.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f9dcb52f3da14bc2fac649/1626987701744/all_of_statistics_solutions_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f8dbad3515ea32024ca7b6/1626921901655/80555904775.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f23736ea581e22be260050/1626486582427/raji_an_ancient_epic_switch.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f8e671efd43c45de71d3e0/1626924658046/lookout_for_work.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f9a797e3f0cd2cfd8abed9/1626974104312/13468421150.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f9dc6310c15512b062723c/1626987619699/parousia_meaning_in_english.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8565e8f65f47218914bd6/1625839198898/free_merger_and_splitter_software.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f653622e93dc7e95b65cb6/1626755938796/jay_sean_ft_2pac_ride_it.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0a22f7792d424934d26ac/1626382895477/drop_him_off_meaning.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f04e6276588c4ecca1507d/1626361442646/roman_number_of_10000.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f9dc823623573d5c8ed38c/1626987650964/nafiwukikovoxul.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f783a053df297156b1b3ec/1626833824520/24150859966.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f836eb9e71af0697c0b2b0/1626879724144/reaction_paper_of_a_movie_example.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f6ee1d93d891638de574d9/1626795549605/dosiburetanujo.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee425db1f8b95648861b82/1626227293903/nofagukukive.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f304f6d9389f5e8089bda2/1626539254919/fapuruno.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e92048db8bb141bad95a85/1625890888834/nunulofetesudek.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_off00012e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E86 18440 bytes
SHA-256: fbad29d523942afe2531cd1b9ac7707cf396f82ab0f0d7224a17b2506d81ecc3
font_01_sfnt_off00015f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F34 10744 bytes
SHA-256: 278b0c10491b1335b2798206730c9f3c39cd7bb18d9a530b6d440e1dee341ff9
font_02_sfnt_off000177d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.