Malicious PDF — malware analysis report

Static analysis result for SHA-256 0984d80578e5f280…

MALICIOUS

PDF

70.1 KB Created: 2020-12-25 02:17:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7cbd649675dd50b23b9ff608c329826 SHA-1: 745f605f9cb37f382e1545fb63fb53db902f4bc7 SHA-256: 0984d80578e5f28092c0f5c4548c6cb497ad736b288d13042c14542becdcfb53
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with one suspicious URL pointing to a domain associated with traffic generation. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to potentially harmful content, possibly for SEO manipulation or to host further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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/aws?utm_term=gaali+chirugaali+song+dj+chatal+band
    • https://cdn-cms.f-static.net/uploads/4426549/normal_5f98c652320df.pdf
    • https://static.s123-cdn-static.com/uploads/4498345/normal_5fc3dd7038158.pdf
    • https://lexijodipegi.weebly.com/uploads/1/3/4/5/134510521/norodage.pdf
    • https://mosodujisar.weebly.com/uploads/1/3/0/7/130739504/notisebatowupekemogi.pdf
    • https://pakoverixofe.weebly.com/uploads/1/3/4/7/134771358/71b052f8cae602.pdf
    • https://daxogane.weebly.com/uploads/1/3/2/8/132815110/woxidisazuna-xesapi.pdf
    • https://detopeda.weebly.com/uploads/1/3/4/3/134305225/7db5b17b6883cda.pdf
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/xaliduvumafuteza.pdf
    • https://zoradelageruwol.weebly.com/uploads/1/3/4/5/134591251/9bb06c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/b67728f7-8a6f-4718-9fe1-a27915f9e366/68813167153.pdf
    • https://uploads.strikinglycdn.com/files/44032508-1e91-4248-bacf-58a99935e0b2/splintertree_post_location.pdf
    • https://uploads.strikinglycdn.com/files/fd49357a-c923-49e5-9b03-6bf8471569c8/31155893678.pdf
    • https://uploads.strikinglycdn.com/files/14d86178-4a73-4961-b995-6ab969332077/25697776534.pdf
    • https://uploads.strikinglycdn.com/files/c808b320-5d38-458d-9d73-592941a55596/super_sniper_movie_korean.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c94f.bin
9f00fe98ed87fb82370b9dbbacdaad04a3c693cb7f075687f4b0d8303442a113
pdf-font-stream PDF embedded font (sfnt) at offset 0xC94F 5212 bytes
font_01_sfnt_off0000daf8.bin
3e05c381b2de2b075a702ee019bd275993e42ae51d42117188ccfaf4836996bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF8 10360 bytes
font_02_sfnt_off0000fd9c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9C 4324 bytes