Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c76696863fac77…

MALICIOUS

PDF

69.9 KB Created: 2021-02-24 01:59:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ed740c520125459db471d836a4545beb SHA-1: 435ec24d1eba497fbd44f403e4c9fce1d4065882 SHA-256: 46c76696863fac77770942ee13064e508a9b00b25387acb8ec258feb296d8a03
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=lyman+reloading+manual+50th+edition+pdf+download PDF link annotation
    • https://nokesopupikes.weebly.com/uploads/1/3/4/7/134767934/lutuwidogawozir.pdfIn PDF document text
    • https://cdn.sqhk.co/sivefuxonix/ccfV2hd/vexelukekirojewogefoxek.pdfIn PDF document text
    • http://ru-order-687646765445.art/tarigidinexujesccvp.pdfIn PDF document text
    • https://zexiditituluw.weebly.com/uploads/1/3/4/7/134734655/7016238.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvazuginu/yjfDcgi/basketball_strike_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/idgjjgg/gatidamuduwuxelo.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/Tzgd1gc/yellowstone_national_park_weather_in_may.pdfIn PDF document text
    • https://xogudefimo.weebly.com/uploads/1/3/0/7/130775634/zideju_zotafegidelesu.pdfIn PDF document text
    • https://cdn.sqhk.co/gokarunedod/WQRhgjl/komevepaju.pdfIn PDF document text
    • https://cdn.sqhk.co/jamasedese/MojdRih/77110951120.pdfIn PDF document text
    • https://nerilumasufut.weebly.com/uploads/1/3/1/4/131437044/dd8a44295.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/qPijRAZ/nowolofir.pdfIn PDF document text
    • https://cdn.sqhk.co/mawodoso/hiijqZC/netflix_price_rise_2020.pdfIn PDF document text
    • https://vamotavobepud.weebly.com/uploads/1/3/1/4/131438348/07a717b.pdfIn PDF document text
    • https://xifabaruwene.weebly.com/uploads/1/3/0/9/130969291/vegelilavixeraxovi.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/jdieFic/the_farmer_s_dog_food_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gozifep/93191300718.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/marvel_movies_in_order_of_story.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/rafatopikumodefadat.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64C 5560 bytes
SHA-256: 4c2ee985dcee02dc8ddad4d223d0aed2a982064a69614869601d696c6375b956
font_01_sfnt_off0000d91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91C 10236 bytes
SHA-256: b1e3682752fdeb555e2583d7c7f6026dc597760e851805d6db4a4d78bea5493c
font_02_sfnt_off0000fc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC04 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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