Malicious PDF — malware analysis report

Static analysis result for SHA-256 45fc9e46620295d4…

MALICIOUS

PDF

82.6 KB Created: 2021-04-02 15:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7110ffc7a246542ed414b87e964fa01b SHA-1: 0dc12bf06c50b0b5b04aa39cde3eef8aa43db436 SHA-256: 45fc9e46620295d4541760949aefd6cf8a45e0c0c1e71883b636c872aadf099c
126 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, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('midufefew.ru') that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains text related to a 'Smart-ups 1500va lcd 230v', suggesting a lure for a product-related scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/strik?utm_term=smart-ups+1500va+lcd+230v PDF link annotation
    • http://mebelrostov.ru/poe_temple_of_atzoatl_room_guide4swpr.pdfIn PDF document text
    • http://sayfelengs.space/26446105229j4stc.pdfIn PDF document text
    • http://ewwe.space/rogejamazimizanegekoxkfxb.pdfIn PDF document text
    • https://cdn.sqhk.co/kepebeso/jbiaKaT/zodiac_signs_facts_aries.pdfIn PDF document text
    • http://pevojatinolotej.22web.org/golf_tournament_flyer_templates_free.pdfIn PDF document text
    • http://izzzaaa.space/rinusemibusozurrtram.pdfIn PDF document text
    • https://cdn.sqhk.co/zatovafer/d1AoFh9/xapawit.pdfIn PDF document text
    • http://itali-big.space/91561659124mfpco.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://uploads.strikinglycdn.com/files/e1f21d25-36a1-4d14-b894-226045c41f13/intel_audio_driver_for_windows_7_32_bit_free_download_for_pc.pdfIn PDF document text
    • http://xikapewegoruzom.epizy.com/debed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab4057d7-d36e-48a1-9784-f05698c0a3cf/kelezekadusofok.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/65071032911.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/how_to_read_1_16_scale_ruler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55a0c1d3-bc65-429e-b607-428a16041ab9/how_to_write_a_contract_law_essay.pdfIn PDF document text
    • http://feliruxitekul.epizy.com/android_17_dokkan_int.pdfIn PDF document text
    • http://bolozenafo.rf.gd/great_gatsby_chapter_7.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/facebook_er_apk_crack.pdfIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_5e92fc2df01c4d0e9a4568984c5db0c0.pdf?index=trueIn PDF document text
    • https://f770b3d7-c897-40e0-9323-5ad0abd91552.filesusr.com/ugd/1fa6dd_4b3f71efbfbc48c08a0aa17f17dc12db.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5321f5dd-b49f-4515-bb7a-25a270e6cec8/38063473489.pdfIn PDF document text
    • https://a22c3535-4c29-4f26-bf6b-1e631d3648e5.filesusr.com/ugd/28986c_6b6032cb7d494a549baddeb21f3b588b.pdf?index=trueIn PDF document text
    • http://zavinawotomuvef.epizy.com/sapamitunafitudanipog.pdfIn PDF document text
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_c491cc7f71fd4a289aa4bab7723626bd.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_off0000f487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF487 5528 bytes
SHA-256: b9f23e0cacdd95bca5cb8fcad3d979ec8868fcc53ae87b901e5973423d550775
font_01_sfnt_off00010757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10757 11556 bytes
SHA-256: 55ffecf48c0af4e9d030ba56c9103c3a96012821ec1bde4c3d0739674c50a2c1
font_02_sfnt_off00012d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176