Malicious PDF — malware analysis report

Static analysis result for SHA-256 2630ffedbe875d77…

MALICIOUS

PDF

77.8 KB Created: 2021-05-19 19:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6c6e3de6393f98e00f8b629a6d9b700 SHA-1: d83523bd746852758c33edf0126bf07b0e658759 SHA-256: 2630ffedbe875d778786034f5f4b716378e20a17757a12da53a2bd057e3b6aec
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 are to SEO-optimized PDF hosting sites, suggesting a link farm for malicious purposes. One of the primary external URIs, 'https://xezojetit.ru/strik?utm_term=2001+jaguar+s+type+service+manual', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/strik?utm_term=2001+jaguar+s+type+service+manual
    • https://sirabirimafo.weebly.com/uploads/1/3/0/7/130739431/4313784.pdf
    • https://pamibatofenowa.weebly.com/uploads/1/3/4/5/134525539/wijubipu.pdf
    • https://xisedemagi.weebly.com/uploads/1/3/2/6/132681548/reroxaxapoxa.pdf
    • https://kutekedutowake.weebly.com/uploads/1/3/4/6/134635623/rokimataj-zukibujexago-pemaresixopigi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/953f2644-f984-457b-a5f4-fadd05619b37/29635749023.pdf
    • https://uploads.strikinglycdn.com/files/cc8fd54a-2b20-43ce-8c23-ffe6327fc3da/does_logitech_m325_have_bluetooth_mouse.pdf
    • https://uploads.strikinglycdn.com/files/ff0e8621-ff86-4804-a194-eef07f4b8e4f/proceso_de_investigacion_cientifica_y_sus_etapas.pdf
    • https://uploads.strikinglycdn.com/files/44725baf-01de-4bbb-897a-267a0cd887ff/99537780596.pdf
    • https://s3.amazonaws.com/nitidadufetenu/wewulogusovovol.pdf
    • https://s3.amazonaws.com/gazitif/twitter_for_android_2._3._6.pdf
    • https://uploads.strikinglycdn.com/files/cdd355c2-6be1-4bdb-86be-22333431e1ae/what_order_should_you_read_the_narnia_books.pdf
    • https://uploads.strikinglycdn.com/files/d65a625d-e6c3-479e-8ab4-19416d27dc7e/pseudocode_examples_python.pdf
    • https://uploads.strikinglycdn.com/files/fa93ffc1-5dba-4400-9741-cf11e907fea6/dexokitumuxavegif.pdf
    • https://s3.amazonaws.com/jolituzoji/dangerous_driving_uk_report.pdf
    • https://s3.amazonaws.com/gifiz/lajofadotiwe.pdf
    • https://s3.amazonaws.com/rewepalazamiso/cefalohematoma_y_caput_succedaneum.pdf
    • https://uploads.strikinglycdn.com/files/7fdedd5e-3068-4cf6-b90a-aef5caea64ee/lords_of_the_sith_manga.pdf
    • https://s3.amazonaws.com/fosawef/biography_template_google_slides.pdf
    • https://s3.amazonaws.com/xakapudakadu/why_does_my_roomba_dies_before_docking.pdf
    • https://uploads.strikinglycdn.com/files/9c3a3ea8-a0d5-4948-a631-5f265348fc33/ditilojiketomofoso.pdf
    • https://uploads.strikinglycdn.com/files/4233d2d0-07c4-4ad5-a40d-2e100b3426e1/10003792814.pdf
    • https://s3.amazonaws.com/zifilobesumafi/jufekinexuloxevib.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_off0000efff.bin
18eacd5209a84e31b87b34989cb0e48b8938e6be2404abd106f2fd37cfa26977
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFF 5720 bytes
font_01_sfnt_off00010384.bin
c323465d6a0e6887da868d416a192a9ac1dcec7599476676243dcbb4013566b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10384 11244 bytes