Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd60e3c64b8000df…

MALICIOUS

PDF

76.5 KB Created: 2021-03-29 16:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 499471d05745bd85af342f927f63a13d SHA-1: d2dd8bee4ed1d3393611c29a1b627ee6802dc3c0 SHA-256: cd60e3c64b8000df2136c9ef99f4e5f98bf726b8ee0941bc1d5edeee7ca1e7d1
244 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as malicious, specifically for containing a large link farm pointing to external resources. The presence of a redirector link and a link farm on disposable hosting suggests an attempt to lure users to malicious sites. While no scripts were extracted, the structure and heuristics strongly indicate a phishing or malware distribution attempt.

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
  • 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.
  • 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.
  • 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://crophysi.ru/wix?keyword=manga+pages+on+wall In PDF document text
    • https://zupevinar.weebly.com/uploads/1/3/0/7/130739631/nopenifubid_tarobonutebod_sivatadewefem.pdfIn PDF document text
    • http://ruvujagefeko.mygamesonline.org/golafunefomopoba.pdfIn PDF document text
    • https://sovopedu.weebly.com/uploads/1/3/5/3/135301682/giluwima.pdfIn PDF document text
    • https://levibezime.weebly.com/uploads/1/3/3/9/133986639/4053936.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/iiJzYje/34096235620.pdfIn PDF document text
    • https://wuwikofoxanep.weebly.com/uploads/1/3/1/4/131437976/8060651.pdfIn PDF document text
    • https://jimekijan.weebly.com/uploads/1/3/2/8/132815057/876c42d7639d131.pdfIn PDF document text
    • http://sedopusomivul.22web.org/free_investor_pitch_deck_templates.pdfIn PDF document text
    • http://xenejesujotolud.mypressonline.com/futumunomagojo.pdfIn PDF document text
    • https://papokekes.weebly.com/uploads/1/3/4/5/134599002/xanipuruduluwudosipu.pdfIn PDF document text
    • https://vigelabed.weebly.com/uploads/1/3/4/3/134368569/154bc583267d3b.pdfIn PDF document text
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/8bfe919ddde6.pdfIn PDF document text
    • https://cdn.sqhk.co/vemosoveveb/jxGBTH0/paypal_prepaid_gift_card_walmart.pdfIn PDF document text
    • http://digodagexokofi.22web.org/24908942567.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/ykxSDgc/54721985455.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jelasojeb.rf.gd/c_bitcoin_mining.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/jeporeza.pdfIn PDF document text
    • http://pafemex.rf.gd/ganob.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/percy_jackson_series_2_book_list.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/xoduzulowojetejigaziz.pdfIn PDF document text
    • http://nizapowedasa.rf.gd/capitec_learnership_application_forms.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_off0000ec51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC51 4988 bytes
SHA-256: 5838d74a2aa5836fde281280ced7370bba215484190b95b6b049bd572a2c9f08
font_01_sfnt_off0000fd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7F 11360 bytes
SHA-256: fea78c87df6b2aff37a6defc4b34d5dab0bcbf0b285f5b5f9eac761e8246f0b8

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