Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3129276c46d9e18…

MALICIOUS

PDF

79.9 KB Created: 2021-03-23 05:29:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: cdbdf4a5e3373534bb87b0070d1e997c SHA-1: 99bb5a32442f446c10eaa604a6ef6560a1dcf874 SHA-256: a3129276c46d9e1810bc82a7d18b92938d75b76143c817ae1e6b4cb1c1095ba8
134 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. The document body, though heavily obfuscated, contains references to 'Chrysler pt cruiser service manual pdf', suggesting a lure to disguise malicious intent. The presence of numerous external URLs, many hosted on disposable domains, further supports the hypothesis of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://kuzutuzo.ru/123?utm_term=chrysler+pt+cruiser+service+manual+pdf PDF link annotation
    • http://rukunikuxajosog.22web.org/short_fairy_tales.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/89429537193.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/belunutikupu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461249/normal_603d0d046c669.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421767/normal_601a05909d30a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_60172a05e7839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495271/normal_60477475b087a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_60241ad1069d8.pdfIn PDF document text
    • http://bibuwobu.22web.org/zomimabezegifusuwewi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455183/normal_60009fe86802b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412165/normal_5fcb20c1386ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380705/normal_5fe185a0e1a8c.pdfIn PDF document text
    • http://jigitozunawada.66ghz.com/endarterectomy_guidelines_canada.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
    • https://f459ab6e-ac57-43ce-b83a-1524846427e4.filesusr.com/ugd/938c70_accf843ca0ec4273834574b5c731f542.pdf?index=trueIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/can_emdr_help_adhd.pdfIn PDF document text
    • http://wumumusonozukak.epizy.com/77710805043.pdfIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_488f81388f6f43dba90f6b33ff326836.pdf?index=trueIn PDF document text
    • https://a49a6154-edc8-4132-95a2-c7bb8d673fe9.filesusr.com/ugd/551169_cb8ef52ad29343c587c3f1c1d0e3f8e0.pdf?index=trueIn PDF document text
    • http://zadesejofugo.epizy.com/moon_is_a_harsh_mistress_line_marriage.pdfIn PDF document text
    • http://tinatuvarisofat.epizy.com/gosomavomaro.pdfIn PDF document text
    • http://nanaxaj.rf.gd/82025100177.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/pink_bollworm_in_cotton.pdfIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_1444442eb2be403494adb5b7c8b2b301.pdf?index=trueIn PDF document text
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_d2c38d5fc5e44502b8ef2eeba1018d75.pdf?index=trueIn 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_off0000ed66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED66 5352 bytes
SHA-256: 99760bddb194781ab3f7de4253003dfbf776bec2587a9fd11391d9e65b0a1ec9
font_01_sfnt_off0000ff81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF81 10148 bytes
SHA-256: eb67c45ff5da8f2965338b8a262d321315c227f85d84fd4d4395da14bd2861c3
font_02_sfnt_off00012223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12223 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333