Malicious PDF — malware analysis report

Static analysis result for SHA-256 375d5ae3cf0cc34b…

MALICIOUS

PDF

90.9 KB Created: 2021-02-25 15:43:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7beafec5eaa47268939196419355f141 SHA-1: d61b599ba4e64042a977fbc6cbfad788ae9e8c5a SHA-256: 375d5ae3cf0cc34b6e57044e3d0de6a4348edeaa6e54476b1c8a79e8e677cf31
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags the sample as a link farm on disposable hosting, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://jacksth.ru/strik?utm_term=r+programming+jobs PDF link annotation
    • http://about-igsupport.com/80279729667wgbyp.pdfIn PDF document text
    • http://help-bluebadgecenter.com/how_to_program_a_radio_shack_pro_136_scanner6nl6w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408176/normal_5fca8ed1921a1.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/4062178480.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/sefuxosufoijl5p.pdfIn PDF document text
    • http://adanakebap.org/51095033710r179j.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/podunofo.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/whats_the_healthiest_thing_to_eat_at_burger_king.pdfIn PDF document text
    • http://torchland.xyz/manual_de_router_tp-link_tl-wr841n_en_espaol14cmh.pdfIn PDF document text
    • https://cdn.sqhk.co/xajamenujo/Smxbhh5/89222166273.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/zawaferabalanaj.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/28653876919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485012/normal_6035da4e63be7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421957/normal_6015e318e244c.pdfIn PDF document text
    • http://christinaanddavid2019.com/xizosebuwutosavalixicv75.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/romeo_and_juliet_text_act_1_scene_5_summary_shmoop.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/hhfjjPQ/wenerebeves.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459054/normal_60212cf6d2301.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451374/normal_5feeb5f7a86d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001041d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041D 3196 bytes
SHA-256: fa4ce496bdf87bfbcfb88700df9fd305094510f12b5557b5a31f906474134eba
font_01_sfnt_off00010f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7A 5332 bytes
SHA-256: 2de90244f11348e3d726c8b5b5a01b515753b5ecea8d6ed8fa01d90e86381062
font_02_sfnt_off0001218b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218B 11748 bytes
SHA-256: 65249c6c0a0b71b447d5950faf77935c1c2b7b96acec2e7fcb1da7729a425a7b
font_03_sfnt_off0001486c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1486C 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

Open this report in the interactive analyzer, or submit your own file for analysis.