Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa67eedb8559913…

MALICIOUS

PDF

74.7 KB Created: 2021-04-25 13:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 67a1d4268c56c9a9d72832491edcade2 SHA-1: 21117edbf4ee91e6d77a40f52102c54340c79db8 SHA-256: 7aa67eedb855991385772994bb9c57ec0dd34b61f2dc3b0ba616c417888c2f14
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous embedded URLs pointing to various domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a specific search term, hinting at a lure for users searching for appliance repair information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=kenmore+coldspot+model+106+fridge+not+cold PDF link annotation
    • http://wiinorama.space/petsafe_wireless_dog_fence_setupuxgsx.pdfIn PDF document text
    • http://smirno.life/how_to_use_zoom_h1_as_a_usb_microphonevj1ka.pdfIn PDF document text
    • http://wuxixezigitezir.mygamesonline.org/13039602448.pdfIn PDF document text
    • http://vuvafasanadiwi.iblogger.org/26552349264.pdfIn PDF document text
    • http://braco.ru/dovomutby1d.pdfIn PDF document text
    • http://insuranceautousa.com/sadness_and_sorrow_piano_midic5mj2.pdfIn PDF document text
    • http://sodobinefudiguw.iblogger.org/what_is_the_princess_name_from_neverending_story.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/gorillaz_members_murdoc1l3f9.pdfIn PDF document text
    • http://wobufiparezir.medianewsonline.com/76369933906.pdfIn PDF document text
    • http://tadefog.medianewsonline.com/60217888607.pdfIn PDF document text
    • http://blacklaser.ru/48495485011zmok4.pdfIn PDF document text
    • http://rasazajafatirek.mypressonline.com/asus_z97_pro_nvme_support.pdfIn PDF document text
    • http://trickyturkey.com/xanojunewhmlbq.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/78868339108.pdfIn PDF document text
    • http://wupoluse.22web.org/kavofupugoge.pdfIn PDF document text
    • http://20970907.net/how_do_you_do_a_hard_return_in_indesignjjcwq.pdfIn PDF document text
    • http://zidexogatik.22web.org/agustin_de_iturbide_biografia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nebiviteg.rf.gd/google_maps_live_traffic_malaysia.pdfIn PDF document text
    • http://zukazito.rf.gd/ninozutiwoputelop.pdfIn PDF document text
    • http://vikimoronunez.epizy.com/bokonafuva.pdfIn PDF document text
    • http://xiwinuxad.rf.gd/tapufuf.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C1 5584 bytes
SHA-256: 730435a2aa94bbb50aaa75a241a3dcd1905b4215ddba1163143c44a2859e9b0c
font_01_sfnt_off0000f6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B9 10816 bytes
SHA-256: 4cffe8fbdfb5a68379e7aa944faf3699e12177613c3e6797d74fc29d01d759dc

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