Malicious PDF — malware analysis report

Static analysis result for SHA-256 012edd56b7e4753b…

MALICIOUS

PDF

78.4 KB Created: 2021-04-02 12:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 83ae7fb3c2e38a5b5eb391540d15d47e SHA-1: 907c92e6fe53eefe98a672b374816d60e94bf846 SHA-256: 012edd56b7e4753bc37e282c1cc0f88db1f4ae92557e3b2962bbbd02917e7b36
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains and hosting services, indicative of a link farm. ClamAV and ML classifiers flagged this as malicious, specifically as a phishing trojan. The embedded links likely serve to redirect users to malicious sites or to manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://lozipotod.ru/award?keyword=biology+science+for+life+with+physiology+4th+edition+pdf PDF link annotation
    • https://cdn.sqhk.co/soxosovave/KbjejeC/dino_racer_walmart.pdfIn PDF document text
    • https://wonumajogo.weebly.com/uploads/1/3/1/3/131379434/bd3dbe0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448995/normal_604c9693d4323.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/5ajcdzf/78965122087.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476015/normal_5ff7727e0f456.pdfIn PDF document text
    • https://cdn.sqhk.co/xetilibul/fKCgdjf/kekabazekegowavi.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/WFic78L/luvereneru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387411/normal_6017bf63a85e8.pdfIn PDF document text
    • http://ruxuzosok.mywebcommunity.org/lemumekapukubedapimotet.pdfIn PDF document text
    • https://vepibasizux.weebly.com/uploads/1/3/1/3/131380915/ladirara-vukonibifobiga.pdfIn PDF document text
    • http://ziposodepow.mywebcommunity.org/zagijosugaletaw.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/anandamela_pujabarshiki_1420_free_download.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/selajitopabun.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/iaahc8n/8_ball_pool_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/eRRRSwW/20591348772.pdfIn PDF document text
    • http://nevinidonet.mywebcommunity.org/38614468364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425533/normal_604d0f0e21ca7.pdfIn PDF document text
    • https://cdn.sqhk.co/zipirevofu/Wphdpgi/being_a_werewolf_and_vampire_in_skyrim.pdfIn PDF document text
    • https://tuzebomutiwok.weebly.com/uploads/1/3/1/3/131398369/146a9d7a81de04.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/30Egg9v/best_fps_shooters_2020.pdfIn PDF document text
    • https://latowinu.weebly.com/uploads/1/3/4/5/134508675/4322760.pdfIn PDF document text
    • https://fenizivafuno.weebly.com/uploads/1/3/1/3/131380836/ratajilabazase.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/hxgcVaU/netutizugadegebuzujoje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gujimosodaza.myartsonline.com/42391962549.pdfIn PDF document text
    • http://fadezanunadafik.myartsonline.com/lg_refrigerator_service_centre_in_vijayawada.pdfIn PDF document text
    • http://zegetafirotazaz.atwebpages.com/nimiwesadolukasukupuzuf.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F0 5540 bytes
SHA-256: ef460de1424d267d6d8cb67cf750435c0d694c341a34886a2dfad442ed7408df
font_01_sfnt_off000105f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F3 11012 bytes
SHA-256: 31f85baefbd0bd1490029e1c92fa095743107d6a122dc5f94037f9f3631224b0