Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f98dec53011e8b…

MALICIOUS

PDF

44.0 KB Created: 2020-10-17 20:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83d0f329d43baf640d3c8a81d88cf412 SHA-1: 9ba4fe56cb7bee5d071dae045820f64b1d583f44 SHA-256: 12f98dec53011e8bcc3a4f26221e040da4e1f1ef24d32647361beb35c25015ce
154 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, which in turn leads to a large number of other PDF files hosted on Weebly. The embedded content suggests a lure for an online application, likely a phishing attempt. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points to a link farm or SEO poisoning tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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://ttraff.club/123?keyword=pmegp+online+application+pdf
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7885719.pdf
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/5099230.pdf
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/bonatijawikotug-wapok-xonod.pdf
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/6d37d7c29be0.pdf
    • https://dujopoda.weebly.com/uploads/1/3/0/7/130739119/ba591fce9.pdf
    • https://bonujuvab.weebly.com/uploads/1/3/2/7/132740321/votagu_reren.pdf
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/9051060.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/4056517.pdf
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/4e0d994f.pdf
    • https://wojeribexojuxu.weebly.com/uploads/1/3/1/8/131856158/lezofixogal_papevinedofera.pdf
    • https://jowodetuleguzu.weebly.com/uploads/1/3/1/8/131856173/4159dca013d461d.pdf
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/8b64cc03a8770.pdf
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/c8a358dd5c9b.pdf
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/wijanozimojozapok.pdf
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/7099023.pdf
    • https://tabuxeniki.weebly.com/uploads/1/3/2/6/132682737/fatume.pdf
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/1d1f8ecc085ca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b2c187ba-8395-400f-a4d0-a0fb9b8af452/33587200706.pdf
    • https://uploads.strikinglycdn.com/files/0f0ed39f-cf0f-4fdf-8d97-5b7ce35d0cdd/zanezu.pdf
    • https://uploads.strikinglycdn.com/files/9406a3d7-2333-49d2-848c-4571136fa60f/fasebisoloxipimo.pdf
    • https://uploads.strikinglycdn.com/files/bd60f3cc-e16f-4b43-966d-8895267f01d6/pixetegoz.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_off00006f68.bin
c72f752189231a42553a2090a1d20a57c62fd5ed794ca8fa714e33e514792b1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F68 5204 bytes
font_01_sfnt_off00008102.bin
c3447eb72c65f65e1875653c38e75c87e9b5e40d408f81606068d2983b039af1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8102 9996 bytes

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