Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8d4497f66b26429…

MALICIOUS

PDF

75.2 KB Created: 2021-03-15 23:07:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f149fe6cb6c82b230956adfa2941aedd SHA-1: 838373b32bbb95438a181bd43013006f12d46c50 SHA-256: f8d4497f66b2642978cf5ae7b8c7a208c32610342a9f28042069c497c114c8d5
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, forming a link farm. The primary URL suggests a keyword-based redirection, likely to facilitate SEO poisoning or phishing campaigns. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent through URL manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/wix?keyword=blacksmith+lab+google+sites PDF link annotation
    • http://vegifeda.mypressonline.com/watafofajidegibizowuxukob.pdfIn PDF document text
    • http://duwuzoruperiged.scienceontheweb.net/acls_2020_american_heart_association.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375703/normal_603d567d171c0.pdfIn PDF document text
    • https://menesifewo.weebly.com/uploads/1/3/0/8/130814293/xopixif_lanabiv.pdfIn PDF document text
    • https://jelisewisu.weebly.com/uploads/1/3/1/4/131410299/7fbddda1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386334/normal_603bace5ef225.pdfIn PDF document text
    • https://tiriwubesunadew.weebly.com/uploads/1/3/0/7/130739346/8d5ce9.pdfIn PDF document text
    • https://rigavimiba.weebly.com/uploads/1/3/0/8/130814992/wamadexupowenes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406463/normal_5fee761bc1f37.pdfIn PDF document text
    • https://malotote.weebly.com/uploads/1/3/4/8/134872882/8067702.pdfIn PDF document text
    • https://sumajodezidozi.weebly.com/uploads/1/3/3/9/133997227/golatiwo.pdfIn PDF document text
    • https://vidiwubiref.weebly.com/uploads/1/3/0/8/130874646/3ca9e.pdfIn PDF document text
    • http://rabemedexisubis.mygamesonline.org/bryce_canyon_national_park_map.pdfIn PDF document text
    • http://dejepuzalew.mygamesonline.org/74790139938.pdfIn PDF document text
    • https://jobajepefo.weebly.com/uploads/1/3/1/4/131482915/e75ec9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449769/normal_5ff85bfea3f8e.pdfIn PDF document text
    • https://safamitiwifiro.weebly.com/uploads/1/3/0/7/130739579/xoxaxijez_sorumufibejirij_kibenaneruni.pdfIn PDF document text
    • https://nigikejogu.weebly.com/uploads/1/3/4/9/134902550/9034263.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://f0ded7c6-1882-44c2-b580-3fd8daacf182.filesusr.com/ugd/1cd4ca_4560bcefc50c4c168e7a43b93286cd20.pdf?index=trueIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_fafc9f243b074d4b8fec75d47eabe836.pdf?index=trueIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_6a74429a0e4f42cb84abc5807a64220c.pdf?index=trueIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_8df6ea984cb647618ea18398f9a247e4.pdf?index=trueIn PDF document text
    • https://53002a68-e35f-4167-ac88-1ab9777d7e72.filesusr.com/ugd/f5bc2a_76c15ac27d594972b11d3a27d608eca9.pdf?index=trueIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_d44a5f5f3b9c4c6aa993a1e82c45e869.pdf?index=trueIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_f90cf0bca89740309be8450cec663c51.pdf?index=trueIn PDF document text
    • http://xipanizi.myartsonline.com/what_are_the_5_main_personality_types.pdfIn PDF document text
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_031ca94edc2a4481a341a3ae938d3f2c.pdf?index=trueIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_77b3c15535c14759a0850ba1925bc957.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_off0000db15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB15 5052 bytes
SHA-256: 9244c537728e60b6c915f956bdbcfb1415411266a9a49c9b36017c857971568b
font_01_sfnt_off0000ec47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC47 10828 bytes
SHA-256: 1f508be5a238a0b4cd8870e624f1747c825302bbff90a4596972dc65d057cb54
font_02_sfnt_off000110ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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