Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e89649c57927503…

MALICIOUS

PDF

80.2 KB Created: 2021-05-10 02:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9b5c90b0c1df04b486eb9fcab0a65a61 SHA-1: 2f3d0a26bb992ba61d3936f730a378350807603b SHA-256: 3e89649c57927503a4a92aa16cf41fca6e2c22f5754128b6e8d12ee71feaa9b1
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which, 'https://ponafet.ru/strik?utm_term=how+to+use+grill+on+microwave', is flagged as malicious and likely serves as a lure for phishing. The file's content, though heavily obfuscated, suggests a theme related to microwave grills, aligning with common social engineering tactics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=how+to+use+grill+on+microwave PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445333/normal_604b11496e4e6.pdfIn PDF document text
    • https://derigogo.weebly.com/uploads/1/3/4/0/134017063/3274561.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416790/normal_5fdd41f94df63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458824/normal_6031826e69ea1.pdfIn PDF document text
    • https://sujarusokebukok.weebly.com/uploads/1/3/1/4/131437349/f1f90.pdfIn PDF document text
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/4691920.pdfIn PDF document text
    • http://kalanuso.iblogger.org/nitixorope.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://5b5cf7c4-d983-4e27-bd54-44d52fc9074e.filesusr.com/ugd/2f9450_8121c36f00b044bf8c55885b42dbd5e7.pdf?index=trueIn PDF document text
    • http://rubirabe.rf.gd/kingdom_hearts_3_walkthrough_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8a27284-9285-4f6b-b6c2-fadb14da172d/top_secret_recipes_wendys_chili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a4a57f-7100-4558-8f8f-7ab36ec33a35/how_do_i_get_my_hp_officejet_pro_8610_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d2369cd-053e-4e69-b2d9-32233a54c884/costco_panasonic_inverter_microwave_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7456ed5-c3fe-44f2-a04a-0989595df89e/17827090196.pdfIn PDF document text
    • https://b998fa74-583e-446a-a2a7-67f41460fdb2.filesusr.com/ugd/e081f8_5038180d37454741a8c382501bb10c1d.pdf?index=trueIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_f2af7e44b51342228b9cbff12fac565f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3dc4980-12ed-4a1d-a5ef-f6449c7bdb3a/67064818787.pdfIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_7b3264faece74d9088e21a993790a4ce.pdf?index=trueIn PDF document text
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_216133555cc0457e939ebebcbb623665.pdf?index=trueIn PDF document text
    • https://56c41596-c8b3-4aa7-a075-23c9724d7f97.filesusr.com/ugd/ed77b2_cebe488b951b473180ccd470f266c962.pdf?index=trueIn PDF document text
    • http://vonubopoz.rf.gd/muzugegaxelujajabifomex.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_off0000efbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBD 5116 bytes
SHA-256: daef978ca0f76341b0707c6e6caaf29102b6d767fef8b43850316dbf26ddd6bd
font_01_sfnt_off0001011d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 10568 bytes
SHA-256: 29dc06b7b08977c89e229f8bd25bcb6b67a18e9036199e402f34c9c2dee02c81
font_02_sfnt_off00012549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12549 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e