Malicious PDF — malware analysis report

Static analysis result for SHA-256 d05f47da75a97b43…

MALICIOUS

PDF

88.5 KB Created: 2021-03-16 08:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6fc9bf6f5f2cac7afc87a5764c69a44b SHA-1: b0917692dfd1244ecf546998c18df33fb951ef1c SHA-256: d05f47da75a97b4393a41a355ac78e07c69803fd5d056869f616c9d8a92336e1
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to appear as a search result to lure users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/award?keyword=aspects+of+globalisation+pdf PDF link annotation
    • https://roxasudafuj.weebly.com/uploads/1/3/0/7/130740166/kelezafaxagep.pdfIn PDF document text
    • http://lobutojumakix.22web.org/sigopow.pdfIn PDF document text
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/tuxujotalilaxemob.pdfIn PDF document text
    • http://lisojuribopuwad.22web.org/osmosis_jones_the_zit_explodes_answers.pdfIn PDF document text
    • http://tijukilebag.getenjoyment.net/smart_watch_faces_reddit.pdfIn PDF document text
    • http://zesenadozefut.sportsontheweb.net/traktor_kontrol_s4_s5_flight_case.pdfIn PDF document text
    • https://bemikazuriku.weebly.com/uploads/1/3/4/6/134648669/b700bad.pdfIn PDF document text
    • http://wuvuzijime.22web.org/brain_image_free.pdfIn PDF document text
    • http://bestunew.xyz/289081838142wqkd.pdfIn PDF document text
    • http://storeeu.info/suddenly_seventeen_eng_sub39kq9.pdfIn PDF document text
    • http://axecheat7.xyz/79254044980m730.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/novotifapagovefimeg.pdfIn PDF document text
    • http://silekutum.medianewsonline.com/35413095165.pdfIn PDF document text
    • http://mrshadow.net/msi_b150m_mortar_m.2_ssdgzasd.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/36584874643.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/ultegra_di2_tt_groupset_price.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/how_to_describe_charts_and_graphs.pdfIn PDF document text
    • http://wokidomogu.onlinewebshop.net/25076399760.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/daxuraxorisebuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/77451489226.pdfIn PDF document text
    • http://tofujuwo.onlinewebshop.net/82893557149.pdfIn PDF document text
    • http://biwodonugawodil.rf.gd/4758105088.pdfIn PDF document text
    • http://texazufuvo.rf.gd/35-_1_human_body_systems_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/kamus_bahasa_arab_indonesia_apk.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_off00011aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AED 5356 bytes
SHA-256: 87fe2246e4a11654c03ac560df5466966210ec178cae5b16138a05048151b666
font_01_sfnt_off00012d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D38 11532 bytes
SHA-256: 6809ef1c89603c21174173dd5d7b2219c306b33a415a02bd4b7f5bb2214e5486

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