Malicious PDF — malware analysis report

Static analysis result for SHA-256 1370fb54fae0cd80…

MALICIOUS

PDF

88.1 KB Created: 2021-01-06 08:46:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3b4227435caabe629576b65992b7f17 SHA-1: 75c0e4bf029f34bdee1cff1f24c1dfe6bc3ccae2 SHA-256: 1370fb54fae0cd80c3fc4e5e1da19da40634be0ec713a27e7daa6336953d71f7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs hosted on various platforms, indicating a link farm. The primary malicious URL identified is traffnew.ru, which is likely used to redirect users to further malicious content or phishing pages. The presence of numerous external links and the ClamAV detection strongly suggest a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=homewood+flossmoor+high+school+football
    • https://cdn.sqhk.co/nomavunut/2JW3dsk/ravuzuxirokobipupesij.pdf
    • https://kidepexabosu.weebly.com/uploads/1/3/4/2/134266059/21ed1d9f.pdf
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/gosibokuvefuj.pdf
    • https://cdn.sqhk.co/xunalafugapa/jjfihjg/xiwasobedomutidu.pdf
    • https://vorenamu.weebly.com/uploads/1/3/4/2/134265490/jibifovu_dejod_rutixolivikivo_fumezix.pdf
    • https://cdn.sqhk.co/daxegajok/hc31hjj/infinity_sign_experimental_machine.pdf
    • https://jadusulad.weebly.com/uploads/1/3/4/7/134764450/2063734.pdf
    • https://vuvitolivudiru.weebly.com/uploads/1/3/2/7/132712253/neduwusameka.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/vigirupiruwovilav.pdf
    • https://fiwozipuwawew.weebly.com/uploads/1/3/0/8/130814157/8b09df.pdf
    • https://lapulefad.weebly.com/uploads/1/3/2/8/132815180/vunopagagemasu.pdf
    • https://cdn.sqhk.co/zokelofid/bjaggL6/demanuxutone.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c46825e8-2203-4fda-b726-348583bdeca4/15488307782.pdf
    • https://s3.amazonaws.com/vipinib/63429869732.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_off000100cd.bin
096f84f1cb1d46817b809f52ed6c26f04cb90576352017de39af36911e87615c
pdf-font-stream PDF embedded font (sfnt) at offset 0x100CD 6892 bytes
font_01_sfnt_off0001185f.bin
545dac7efbb5d336ceefb7997dea35ee1b5cd7e8c53d167728b8392399a59e70
pdf-font-stream PDF embedded font (sfnt) at offset 0x1185F 5628 bytes
font_02_sfnt_off00012b6b.bin
c6743aafa1d477f62deedd7725d7ae59c1d00c0d76e67ecbce2dd2915eca7c83
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6B 11564 bytes