Malicious PDF — malware analysis report

Static analysis result for SHA-256 a83648a1822b2b71…

MALICIOUS

PDF

77.3 KB Created: 2021-02-26 15:18:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 0fa9b678437bf2908589bc7d10fd0355 SHA-1: 82972d7159e8d30ca9e8fcd44c2d5e48074ac138 SHA-256: a83648a1822b2b71b0a0dac4a7435287e94153ef3afb5ed3f7758dbe0c22290b
126 Risk Score

Malware Insights

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

The sample was detected as a phishing/malicious PDF by ClamAV and ML classifiers. It contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The PDF's structure and the presence of external URIs suggest it's part of a phishing campaign or a distribution mechanism for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/123?utm_term=meade+lx200+telescope+review PDF link annotation
    • http://gojawufeki.getenjoyment.net/do_smart_scales_really_work.pdfIn PDF document text
    • http://daating19.site/how_to_setup_samsung_verizon_network_extenderb04tx.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/duwiwumo.pdfIn PDF document text
    • http://whysmall.space/370409234495xhew.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/wDljbwr/33756453231.pdfIn PDF document text
    • https://cdn.sqhk.co/zatufora/VpbihJh/champion_of_the_gods_gifts.pdfIn PDF document text
    • http://lobulezinovux.medianewsonline.com/how_to_factory_reset_hp_officejet_4630.pdfIn PDF document text
    • http://sokfresh.fun/49433448122mrlau.pdfIn PDF document text
    • https://cdn.sqhk.co/mezigiduze/UjduLCX/10914461513.pdfIn PDF document text
    • https://cdn.sqhk.co/xewazezikufi/cnjb5RM/44186281043.pdfIn PDF document text
    • http://gagitevanonuti.mywebcommunity.org/89687676484.pdfIn PDF document text
    • http://newuwedeza.mypressonline.com/blood_bowl_2_vs_legendary_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/zatufora/jcjeKDb/gofopod.pdfIn PDF document text
    • https://cdn.sqhk.co/fomeluxilim/vrHshcX/games_online_free_no_download.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/lg_sw_440_gr_g2.pdfIn PDF document text
    • https://cdn.sqhk.co/lokojagivel/ieCfkje/tips_for_ice_scream_horror_3_sponge_neighborhood.pdfIn PDF document text
    • http://9gusevshop.space/52917385359ax23m.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/hggFdhf/idle_success_no_ads.pdfIn PDF document text
    • https://cdn.sqhk.co/pijajawopoji/7wgcij2/wizexosameba.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/beruwoniroguvefilubu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tiwatimab.atwebpages.com/what_state_has_the_coolest_summer_weather.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/rival_ice_cream_maker_walmart.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_off0000f0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D9 5568 bytes
SHA-256: 82c8990b0ec3984ce58ba47ed7fc0e8d0fea14349195baaa6a338eccfd33be30
font_01_sfnt_off000103f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F6 10536 bytes
SHA-256: 5be8cc51b169d11a67c23e1064d15e8bf7de0e90527d7168c30dd61057078b10

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