Malicious PDF — malware analysis report

Static analysis result for SHA-256 1404b505ef96b569…

MALICIOUS

PDF

76.2 KB Created: 2021-03-28 11:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c7092ad4caf41d7920f68e711232956 SHA-1: 64885ce34e1c3543ff4ff333c1c063b6d3297061 SHA-256: 1404b505ef96b569bbea927fea1ed0021161191afb26e8bb06f68d90545b49aa
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure. The ClamAV detection and ML classifier also indicate malicious content. The primary goal appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/strik?utm_term=brominated+vegetable+oil+in+mtn+dew
    • https://static.s123-cdn-static.com/uploads/4368248/normal_5fefa07fed243.pdf
    • https://cdn.sqhk.co/zenegiwowi/heBehhu/need_for_speed_no_limits_game_apkpure.pdf
    • https://cdn.sqhk.co/japuwejede/5zifRnB/let_grace_guide_you.pdf
    • https://gukilebulasule.weebly.com/uploads/1/3/2/6/132682884/aba9f2214b.pdf
    • http://rinusiwujegabu.medianewsonline.com/xemebuxa.pdf
    • https://mipabewezodif.weebly.com/uploads/1/3/5/3/135315693/tazajifirebadod.pdf
    • https://genofegewad.weebly.com/uploads/1/3/0/7/130776157/642e5f14.pdf
    • https://cdn.sqhk.co/wubejiwixu/g9poXKi/75541211881.pdf
    • https://cdn.sqhk.co/xoxamomajil/5g7jhgd/65873209858.pdf
    • https://cdn-cms.f-static.net/uploads/4505363/normal_602103f72daac.pdf
    • http://nupesupo.mypressonline.com/what_is_the_major_storm_on_jupiter_called.pdf
    • http://zagodutaf.getenjoyment.net/5567254596.pdf
    • https://cdn.sqhk.co/nomuzali/hmjjKhj/endless_jungle_run_adventure_golf.pdf
    • https://cdn.sqhk.co/fikubife/chijghd/laxoxoluzilunonenawisas.pdf
    • https://tewafegode.weebly.com/uploads/1/3/5/3/135350941/3875495.pdf
    • https://cdn.sqhk.co/konafomaz/mhidgdv/ghost_rider_2099_vol_1.pdf
    • https://cdn.sqhk.co/xamitarerivu/eEhdifD/25057567782.pdf
    • https://cdn.sqhk.co/rasepotobami/LjhibaC/nijezixaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wegemejejo.epizy.com/29119639954.pdf
    • http://dezologukow.rf.gd/79838758650.pdf
    • http://juvugakor.rf.gd/dielectric_waveguide_cutoff_frequency.pdf
    • http://sadozejeko.myartsonline.com/baby_likes_to_rock_it_line_dance.pdf
    • http://temekem.epizy.com/69149299190.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_off0000eafa.bin
e60f9d9a75cb07efe4ef0eec48f41132a6485b76b58c6a780d6bf7102a7a2cfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFA 5308 bytes
font_01_sfnt_off0000fd03.bin
325ed1b8ddb59dd496229e5804ae71260d3ac6a10154242ec664e0b24e128fa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD03 11512 bytes

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