Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae349eceb3919da1…

MALICIOUS

PDF

83.0 KB Created: 2021-03-04 01:13:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b0a5ee0a6f1d0db70e9341777ca9cfae SHA-1: 5f6ea92fc7c5502a37fdc6fecc4aae233ddff288 SHA-256: ae349eceb3919da149d26e1751d58501f494d7b8ce890f2521e69299c34cbede
186 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs that likely lead to phishing sites or malware downloads. The PDF document's structure and embedded URLs suggest an attempt to manipulate search engine results or lure users to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wix?keyword=brainpop+food+chain+quiz+answers PDF link annotation
    • https://dusibijerike.weebly.com/uploads/1/3/2/6/132695870/e6633dfcf.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/ign7jar/javep.pdfIn PDF document text
    • https://cdn.sqhk.co/vefutifeves/2eMnMid/11062510409.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/Yhgjhhd/blue_cross_blue_shield.pdfIn PDF document text
    • https://tovefejuxula.weebly.com/uploads/1/3/5/3/135325554/bobogibiru.pdfIn PDF document text
    • http://bizitegule.22web.org/administrador_de_dispositivo_android_gmail.pdfIn PDF document text
    • https://cdn.sqhk.co/zanemulazif/gieHher/wiwunuwulisaxusibutid.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/are_any_nail_salons_still_open_near_me.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/how_do_i_reset_my_funlux_camera.pdfIn PDF document text
    • https://rorezumi.weebly.com/uploads/1/3/4/5/134591247/2658638.pdfIn PDF document text
    • https://cdn.sqhk.co/nogawevorus/heKhfG8/neo_geo_arcade_stick_pro_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/folikulezig/ikL3Rig/ncert_science_book_class_9_solutions_physics_motion.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/PiiZCgj/beard_styles_stubble_beard_moustache_styles.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/aiQjhSL/gegosomuvonapasuxefufenu.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/ghqhdgd/59957999805.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kikukuvikato.myartsonline.com/pazuri.pdfIn PDF document text
    • http://pigutun.myartsonline.com/transformers_revenge_of_the_fallen_optimus_prime_comes_back_to_life.pdfIn PDF document text
    • http://roxujewov.myartsonline.com/43903164323.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_off0000fd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD76 2828 bytes
SHA-256: 3b89a1333aa93e194de12c5c5da229a8f3a969ace6b07a90c5323b9ece6747ec
font_01_sfnt_off00010771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10771 5528 bytes
SHA-256: e9681fed86c2739b5488eca4e4f8acb5d604188fa32287eea71a0f68de0d7624
font_02_sfnt_off00011a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A55 10016 bytes
SHA-256: f7cbfb9ff7167693f180c28cb2a69105e05535a956a094c75a7e59308a72fd96

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