Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b20b5a29db1918…

MALICIOUS

PDF

77.8 KB Created: 2021-03-17 17:16:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2d60e823e53bcc52761930ca666c080f SHA-1: 0e6880d6ac5b4be430631460324260a37e97fb72 SHA-256: 63b20b5a29db1918cc335be89941bbb0518be441607f5e82921c81d36317d54b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to an online game guide, directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=settlers+online+expedition+guide PDF link annotation
    • https://cdn.sqhk.co/lijuwezasip/jCij6if/dog_ball_pit_amazon.pdfIn PDF document text
    • http://daddytestit.xyz/how_to_connect_hp_deskjet_2545_wireless588wj.pdfIn PDF document text
    • https://cdn.sqhk.co/besawevij/jgidhg6/93803553166.pdfIn PDF document text
    • http://microdigitalmeter.xyz/84701463317q6e7g.pdfIn PDF document text
    • https://cdn.sqhk.co/domonuxasi/j1jj9hK/supajifaxesovepore.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/Z1mijI9/carx_drift_racing_lite_mod_apk_obb.pdfIn PDF document text
    • https://cdn.sqhk.co/zunowexafa/Wgghdic/lurelu.pdfIn PDF document text
    • https://cdn.sqhk.co/tumitibira/aihjhjf/truck_wallpapers_for_cell_phones.pdfIn PDF document text
    • https://cdn.sqhk.co/dekorasenu/aEAxIhc/faliluvejufunaxowakaluli.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/Tifibji/supreme_hair_bobbles_ebay.pdfIn PDF document text
    • http://best-store.club/guided_re-_energising_meditationi3vbq.pdfIn PDF document text
    • http://portkamesto.site/anais_gumball_quotesq4ij7.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
    • http://lamerowed.rf.gd/cameraman_gangatho_rambabu_songs_naa_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/magapimiporaberusojij.pdfIn PDF document text
    • http://dobejul.epizy.com/davis_cup_2019_tv_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e15683b9-619a-415f-a4c2-c5d4e50c2f44/wiboxojekiparuwikukoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e733256-97bc-4406-b12b-24a0413af62a/64554370626.pdfIn PDF document text
    • http://tedejokalegiruj.epizy.com/kememakulebem.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/what_does_the_national_human_trafficking_hotline_do.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e100da1-6632-47db-845f-389e852628cf/hisense_portable_air_conditioner_customer_service.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/fiwuxurusipebizafazezibu.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_off0000e514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE514 4972 bytes
SHA-256: 4fb87ebff73cd989fb91627680248a110aabfb49f300ed49969f3beab84d0010
font_01_sfnt_off0000f604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF604 11144 bytes
SHA-256: e1908ea26d1a3e398210ded10d3809ba6217a02b7c9e3b7da2a9ea784228d479
font_02_sfnt_off00011bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD8 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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