Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fbe8d0d1d87162…

MALICIOUS

PDF

81.4 KB Created: 2021-03-10 01:48:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 8936b70964062ab108eb66e0e844e486 SHA-1: f1253f527e52b423300354b97634d546e1b5ca21 SHA-256: c6fbe8d0d1d8716292bb97a5a57684264faeac26f89e763f3c7d9b3ce998e858
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains references to financial management and wkhtmltopdf, hinting at a lure for users interested in financial topics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/wix?keyword=gestion+financiera+importancia PDF link annotation
    • https://cdn.sqhk.co/negolura/TulS4hc/81885560293.pdfIn PDF document text
    • https://cdn.sqhk.co/fudopalizew/ie2ghYw/barrett_jackson_florida_2020_dates.pdfIn PDF document text
    • http://sravniproxy.info/rodujitolwna7.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/UndY12h/juxufaporusenapovovapal.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/ij9nwMF/75324448837.pdfIn PDF document text
    • https://cdn.sqhk.co/jejekije/ihDiiGh/plan_control_claro_uruguay.pdfIn PDF document text
    • http://trellos.fun/61314953435lpasc.pdfIn PDF document text
    • https://cdn.sqhk.co/mivijigonof/gfbghjj/dubai_mall_restaurants.pdfIn PDF document text
    • https://cdn.sqhk.co/poxofufiko/bpqtngd/cheapest_off_road_tires.pdfIn PDF document text
    • http://lovupijuti.getenjoyment.net/kriteria_sepsis_neonatorum.pdfIn PDF document text
    • https://cdn.sqhk.co/dofofigeniso/cCZa3he/video_chat_application_for_android_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/d5idic2/phoenix_wright_ace_attorney_walkthrough_case_3.pdfIn PDF document text
    • http://lnstagaram-verifiedbadges-from.com/how_to_draw_a_boy_face_step_by_stepnmxv6.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/jevid3M/20731093058.pdfIn PDF document text
    • http://xiruzox.mygamesonline.org/zirofibevibajokomozebiwaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nononulavojiki.myartsonline.com/cesur_yeni_dnya_oku.pdfIn PDF document text
    • https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_4f9c6c71445c4298af490da35afc6612.pdf?index=trueIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_9d38a64211e64ab882b2cfc3b0e14714.pdf?index=trueIn PDF document text
    • http://dapekafuxururo.myartsonline.com/all_about_sound_engineering.pdfIn PDF document text
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_62c1122e65534beaa75025657fa4ee3c.pdf?index=trueIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_9a31df91e2754f2491dcebe98b054989.pdf?index=trueIn 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_off0000f823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF823 5160 bytes
SHA-256: 76cb4447f3966bd9370480feff0c90b1a92211c01facf045f885de1916b52e95
font_01_sfnt_off0001099f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099F 14872 bytes
SHA-256: 0029eaf9a6a2ac3dd5fba0be284af69567fc760392ca46381a8946130ffa9d17