Malicious PDF — malware analysis report

Static analysis result for SHA-256 755b21596e725840…

MALICIOUS

PDF

46.2 KB Created: 2020-11-07 23:31:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 4602e4ec9b9c3f98742a5de93cda10f5 SHA-1: f3d646abb96d63978fa4e7ddf26a288ba7489989 SHA-256: 755b21596e725840550ded086a7398b6e1cf474cdc1066aed3dadf12f3f7cfd0
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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.
  • 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/aws?keyword=apk+fix+fortnite+apk In PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/3921597.pdfIn PDF document text
    • https://bofufawikifof.weebly.com/uploads/1/3/4/2/134235483/vabakadaren.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/zitanigojokizikiwij.pdfIn PDF document text
    • https://fisizupesaxog.weebly.com/uploads/1/3/1/6/131636899/nanajuzejurevibi.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/a65ee92.pdfIn PDF document text
    • https://rixijufufapug.weebly.com/uploads/1/3/4/4/134497528/225593.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/senodiw/decreto_1080_de_2015_gestion_documental.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/27172592084.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/crosskicks_hoffman_estates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/756b934b-fe2e-4674-8b0d-dd78d82b19a9/gojarutagapukavodixelo.pdfIn PDF document text
    • https://romekelisefo.files.wordpress.com/2020/11/nitunawikudaremutujozudok.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/nba_streams_reddit.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5487 4808 bytes
SHA-256: e4f8f44de703507f8304c7e53bcdf9910b09d6b9210ea880e0fb424a9b7e155c
font_01_sfnt_off000064f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F1 2480 bytes
SHA-256: 877b4be657496de0de11723dd83f080ac8ef001e70532dc9582759c2eba4938f
font_02_sfnt_off00006feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEB 11824 bytes
SHA-256: 44a2451895f36b5a3a06a8a9e6f0d425c4c6b846f93303b38bbeb27893841642
font_03_sfnt_off0000960a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x960A 16240 bytes
SHA-256: 30ebec016da6a701a8891c0414a5d7aaa84de11cf8a800a2977b451ebfe30ce4