Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aca7a9c4966b746…

MALICIOUS

PDF

77.2 KB Created: 2021-03-31 03:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2794c98610ee36fbaa9573aace10312a SHA-1: ccfa57abc4e12ef0b6a3f39bcf5fab14c18908a7 SHA-256: 6aca7a9c4966b746672985c7dda2b30f4d88ce1366a59750290626ecdbb09f3c
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which are hosted on disposable domains or redirect to known malicious infrastructure. The document body, though partially corrupted, suggests a lure related to iPhone reset procedures, likely intended to trick users into clicking malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=how+to+reset+iphone+using+itunes+on+computer In PDF document text
    • https://farenutatovepo.weebly.com/uploads/1/3/4/5/134502273/xugibivak_mejutujuzalixan.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/6118400.pdfIn PDF document text
    • https://lufegema.weebly.com/uploads/1/3/4/1/134132410/20dad6d9bc65035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368237/normal_6014291f3946b.pdfIn PDF document text
    • https://govoxarenaja.weebly.com/uploads/1/3/4/8/134874143/favek-zepefum.pdfIn PDF document text
    • https://refanoripusegu.weebly.com/uploads/1/3/4/3/134306014/ca75ff9ead2e46d.pdfIn PDF document text
    • https://sewurinibe.weebly.com/uploads/1/3/4/5/134595705/zamanowifukoriniruni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380869/normal_5ffb6630117e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405674/normal_5ff791f95e364.pdfIn PDF document text
    • https://kadorupadidugi.weebly.com/uploads/1/3/1/6/131636929/b286a7f23.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_94905270a75d404cb20f095c2fbc448a.pdf?index=trueIn PDF document text
    • https://7e70056c-c2aa-4e53-98c5-50750123c107.filesusr.com/ugd/f8ae5d_efad233eb9c64a1c9afed80b431fea6c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/defujo/pinokejadekezijazavuwo.pdfIn PDF document text
    • https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_b71442069be84636a7394f9163db7340.pdf?index=trueIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_5c3e3aa7b0f34703b96c4ab9e162b8c5.pdf?index=trueIn PDF document text
    • https://ac25a69f-a984-4293-9c3d-8c9e0f062535.filesusr.com/ugd/cbf077_2d7d621f9a374753b4f53c3cf700a800.pdf?index=trueIn PDF document text
    • https://28f2c00a-638b-45ec-8848-4d649cb6aba9.filesusr.com/ugd/946f28_3ef293abaf5f48c591b9e3575e6cd6a7.pdf?index=trueIn PDF document text
    • https://2df275fc-a8dd-466e-be95-33fe0afe7bed.filesusr.com/ugd/9b6d1e_1b9287cdbbb84897a0a0055f02b41cff.pdf?index=trueIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_baa977252f304d7e9131228092c3d350.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazomo/60168754126.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/how_hard_is_it_to_get_pmi_certified.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/90917511161.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF129 5160 bytes
SHA-256: 0d075d0c0493ef5cfce35155ff1506c8cdf5771d8e4dc85f3b5f4c91ffc4326d
font_01_sfnt_off000102a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A3 10560 bytes
SHA-256: a205c173f297ec9fa8473812ac9fa0ff44bb3878146aca32e566306b275e59ec

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