Malicious PDF — malware analysis report

Static analysis result for SHA-256 2662bc00bda756da…

MALICIOUS

PDF

78.8 KB Created: 2021-03-14 13:04:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 614780d72d0dd2b11ef2a655d5a8deeb SHA-1: 11a40d7e07439f9dfa328f44a62f6d3dd73e7b01 SHA-256: 2662bc00bda756da175bd8699ef7e7a53cf6714ce324d1f6e4a4fc78cb0a6727
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document body, though partially corrupted, suggests a lure related to 'boogie woogie guitar sheet music'. Numerous external URLs are embedded, many pointing to disposable domains or link farms, indicating a phishing or redirection attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://lozipotod.ru/123?utm_term=boogie+woogie+guitar+sheet+music
    • https://cdn.sqhk.co/purilusevike/ohavhh8/panda_family_bubble_gum.pdf
    • http://xozonline.ru/the_umbrella_academy_comic_klausxwxw0.pdf
    • https://wilowukodol.weebly.com/uploads/1/3/4/8/134881933/lizapeno.pdf
    • https://cdn.sqhk.co/zimofuzam/pWhjhiL/97239339505.pdf
    • http://buloshnaya.site/lenovo_thinkpad_t430_price_newyk3gi.pdf
    • http://prizyivnik.ru/xulajegatogipovadipo6u9.pdf
    • https://vumenaxusavow.weebly.com/uploads/1/3/4/6/134600171/5bef24e9d218.pdf
    • https://cdn.sqhk.co/lekusovu/httnlhe/tibotulezupikik.pdf
    • http://medicinfo.online/36315659619ni7je.pdf
    • https://cdn.sqhk.co/zokuwagopole/pVjdzJE/candy_jump_record.pdf
    • https://semizafug.weebly.com/uploads/1/3/1/8/131871859/fijezoxekisex_nagejulapulir.pdf
    • https://cdn.sqhk.co/sugifila/jisEihH/77820461544.pdf
    • https://fewebiporunivag.weebly.com/uploads/1/3/0/7/130775920/fojijolaba.pdf
    • http://ruzazeruduzelu.22web.org/kenwood_dpx501bt_price.pdf
    • http://naturfresh.space/the_cat_in_the_hats_learning_library_by_dr._seuss_20_book_box_set9sm7w.pdf
    • https://renixopofofof.weebly.com/uploads/1/3/4/4/134486295/bijopejebib_litasa_worurovez_wifijiluwe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bipovoromoj/gumufumi.pdf
    • http://kasamikapumumo.epizy.com/advertising_appeals.pdf
    • http://sagulisopopu.epizy.com/microfacies_of_carbonate_rocks.pdf
    • https://b9e1b105-38e0-4bbf-baad-90de1e2021e1.filesusr.com/ugd/432b07_267b9ed52d03429c84152d94944e42e9.pdf?index=true
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_b179ae91cafb4339b1440e9ffbe26a57.pdf?index=true
    • https://s3.amazonaws.com/befarekogol/voxuwozodepusopixerumetin.pdf
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_8c9fa8e00b42490f899502795393d62e.pdf?index=true
    • http://dogamesesokuj.rf.gd/algorithm_design_tutorial.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3e3.bin
fc293424fca987bf28879908f003dc6723937e6ec624b4235ea73ccf012db835		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E3 5324 bytes
font_01_sfnt_off000105ef.bin
497224f113f60d035d21ed80f6a15593ff28583f7923b9d0bea008249599f820		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105EF 11668 bytes

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