Malicious PDF — malware analysis report

Static analysis result for SHA-256 215b174aee5d5ac7…

MALICIOUS

PDF

80.9 KB Created: 2021-03-28 17:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: fa1bb0cc24b0f09f9730ce31c6b4ebab SHA-1: 30e97ee68e21d5a11ed2ea9687c485fb35d0d2a5 SHA-256: 215b174aee5d5ac74f41f97b8db296b1ec3aa89aacf75815307244685b261cce
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spamming operation. The primary URL, 'https://resalured.ru/strik?utm_term=skyrim+level+up+alchemy+glitch', suggests a lure related to game exploits. ClamAV and ML heuristics confirm the malicious nature of the PDF, likely used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://resalured.ru/strik?utm_term=skyrim+level+up+alchemy+glitch PDF link annotation
    • https://xinosete.weebly.com/uploads/1/3/0/9/130968926/banexatekonatavuti.pdfIn PDF document text
    • https://zowadadevifu.weebly.com/uploads/1/3/4/5/134597758/riguwifoguxulusebe.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/Aiajhhh/history_of_ancient_rome.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/8806630.pdfIn PDF document text
    • https://wojumujar.weebly.com/uploads/1/3/5/3/135396772/juxemidipemiwup-degolulewax-ludug-fokezuw.pdfIn PDF document text
    • https://cdn.sqhk.co/visesefider/ARgdhjL/38264683205.pdfIn PDF document text
    • https://sojisesoto.weebly.com/uploads/1/3/1/4/131437607/vokuxifazoxewasu.pdfIn PDF document text
    • https://kixivoveluvib.weebly.com/uploads/1/3/0/7/130775150/dejegorizusuboxi.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/brn6Mha/68298200252.pdfIn PDF document text
    • https://derigogo.weebly.com/uploads/1/3/4/0/134017063/4446410.pdfIn PDF document text
    • https://vilekelapufixev.weebly.com/uploads/1/3/4/5/134508089/jirabaxigesuda_pirel_bijetogabusaxud.pdfIn PDF document text
    • https://burufazifefep.weebly.com/uploads/1/3/4/5/134584298/7989696.pdfIn PDF document text
    • https://zujujogonawanuk.weebly.com/uploads/1/3/4/8/134879196/8171fd2878.pdfIn PDF document text
    • https://webapifupa.weebly.com/uploads/1/3/4/7/134706955/falobukow.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/bjdhSNo/81584492685.pdfIn PDF document text
    • https://tubolapibakosi.weebly.com/uploads/1/3/4/8/134872187/eef127a8.pdfIn PDF document text
    • https://jibokogemi.weebly.com/uploads/1/3/4/7/134767321/nafeduwaxoduve.pdfIn PDF document text
    • http://tuvimokasodo.22web.org/somewhere_over_the_rainbow_what_a_wonderful_world_ukulele_chords_easy.pdfIn PDF document text
    • https://vexibalob.weebly.com/uploads/1/3/4/8/134896466/4b8e219fefb2.pdfIn PDF document text
    • https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/856478.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuzavaxevarap.epizy.com/how_to_reverse_traxxas_tq_steering.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/sony_alpha_dslr_a300_review.pdfIn PDF document text
    • http://rijujala.epizy.com/auto_call_recorder_app.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/guide_d_installation_livebox_play_orange.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/how_many_promotion_points_is_field_sanitation_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/guwelibagenuja.pdfIn PDF document text
    • http://lejugilisotev.rf.gd/forozutujutosorisiwinowi.pdfIn PDF document text
    • http://sijopar.epizy.com/ms_excel_stock_inventory_template.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_off0000fede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDE 5496 bytes
SHA-256: aaad59f6293b09908aa957b8867d8e64c633c7e244e85e924169f75ff6d0baf9
font_01_sfnt_off00011178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11178 10600 bytes
SHA-256: 08881502a70b521e18c38c539fbed3968966e2395c278dc5c3750e707b02529a